Electric cardiosignal recorder in free motion activity

FIELD: medicine.

SUBSTANCE: electric cardio signal recorder in free motion activity comprises an amplifier (1), an analogue-to-digital converter with a multiplex switch (2) and series decomposition unit (3), second arithmetical-logical unit (4), an arithmetic unit (5), an increment code analyser (6), a switchover unit (7) and a digital modem (8), as well as a control unit (9), first (12) and second (10) memory units, an increment code counter (11). A second output of the second arithmetical-logical unit (4) is connected to a first input of a decomposition unit (3); an output of the second memory unit (10) is connected to a second output of the second arithmetical-logical unit (4); a second output of the increment code analyser (6) is connected to a first input of the first memory unit (12), while a third output - to a first input of the increment code counter (11), an output of which is connected to a second input of the first memory unit (12) an output of which us connected to an second input of the switchover unit (7); first, second, third, fourth, fifth and sixth outputs of the control unit (9) are connected respectively to a first input of the analogue-to-digital converter with the multiplex switch (2), a second input of the decomposition unit (3), an input of the second memory unit (10), a third input of the second arithmetical-logical unit (4), a second input of the increment code counter (11) and a third input of the switchover unit (7). The device also comprises an electrode break detector (13) and a heart critical state detector (14). The amplifier (1), the electrode break detector (13), the analogue-to-digital converter with the multiplex switch (2), the heart critical state detector (14) and the decomposition unit (3) are series connected. A seventh output of the control unit (9) is connected to a fourth input of the switchover unit (7); a second output (17) of the electrode break detector (13) is connected to a first input of the control unit (9), a second input of which is connected to a second output (24) of the heart critical state detector (14), and a second output of the second memory unit (10) is connected to a second input (22) of the heart critical state detector (14).

EFFECT: using the invention enables enhancement by detecting the electrode break and the heart critical state in free motion activity.

3 cl, 12 dwg

 

The present invention relates to medicine, can be used for registration, analysis and transmission of electrocardiogram (EX) under the conditions of free movement activity.

A device for registration of electrocardiogram [1], containing connected in series amplifier and analog-to-digital Converter with multiplexer and the arithmetic unit, a memory unit, a digital modem, the analyzer code increments the counter non-code increment, the switch unit and the control unit, and the analyzer input codes increment is connected to the output of the arithmetic unit, the first output of the analyzer code increment connected to the first input switch unit, the second to the first input of the memory block, and a control output to the first input of the counter code number increment, a second input connected to the first output control unit, the second and third outputs of the latter are connected respectively with the control input of the switch unit and the second input of the analog-to-digital Converter, and the output number counter code increment connected with the second input of the memory block, the output of which is connected with the second input of the switch unit, and the output switch unit with modem input.

The disadvantages of the known device is that the registration of the FORMER he is in the time domain, if this is not fixed temporal localization of the frequency components of the signal, without which is impossible modern heart conditions ' diagnosis [2].

Known selected as a prototype device for registration of electrocardiogram [3], which contains an amplifier, an analog-to-digital Converter with multiplexer and connected in series block decomposition, the second arithmetical and logic unit, arithmetic unit, the analyzer code increment, a switch unit and a digital modem and control unit, the first and second memory blocks, the counter code number increment, and the second output of the second arithmetical-logical unit connected to the first input of the block decomposition, the output of the second memory block is connected with the second input of the second arithmetical-logical unit, the second output of the analyzer code increment connected to the first input of the first memory block, and the third output to the first input of the counter code number increment, the output of which is connected with the second input of the first memory block, the output of which is connected with the second input of the switch unit, the first, second, third, fourth, fifth and sixth outputs of the control unit are connected respectively to the first input of the analog-to-digital Converter with multiplexer, a second input block decomposition, the input of the second memory block, which is Jim input of the second arithmetical-logical unit, a second input of the counter code number increments and the third input of the switch unit.

The essence of the known device for recording electrocardiogram is to strengthen the FORMER and converting it into a digital code surface energy density, followed by transmission through a digital modem.

The figure 1 shows a diagram of a known device for recording electrocardiogram.

The figure 2 shows an image of the ideal EX.

The figure 3 shows the parameter table EX normal (a) and localization of myocardial infarction according to the FORMER (b).

Figure 4 shows examples of real EX critical state of the heart (KCC).

The figure 5 shows an example of real EX for breach of contact of the electrode-skin.

A disadvantage of the known devices is the inability to determine:

- violations contact the electrode-skin;

- the critical state of the heart.

These shortcomings do not allow the use of the known device for recording electrocardiogram under free motor activity.

Let us consider these drawbacks.

When you register EX under free motor activity, attention must be paid to the reliability of contact of the electrode-skin and alarm violation. Free locomotor activity involves Autonomous is the General operation of the device for registration of the FORMER, therefore, an important feature is the possibility of detection of abnormalities in the heart and determination of its critical state.

With long-term records of the FORMER is often disrupted by the contact of the electrode-skin, and the longer the electrode remains on the patient, the more often it happens. In intensive therapy electrodes are replaced every day or every shift. In the conditions of free movement activity is a risk of breakage of the electrodes is increased, therefore increasing the risk of getting artifacts on registered EX that leads to the impossibility of further analysis of the data.

The figure 5 shows an example of a signal in the absence of contact of the electrode-skin. The observed signal is a combination of interference and bears no semantic load that makes it impossible for its analysis and leads to unnecessary waste of energy.

Thus, from the description of the known device is the inability to determine violations of the contact electrode-skin.

Another disadvantage of the known device for recording electrocardiogram is impossible to determine the KCC.

In the known device for recording electrocardiogram there are no blocks to determine the KCC.

It is known that diseases of the circulatory system ranked first among causes of disability and mortality PL is in the planet. In industrialized countries, 15-20% of the adult population suffers from IBS. It is a cause of sudden death in 60% of patients who died from cardiovascular disease. According to the authors of the present invention, the critical state of the heart is arrhythmia and one of the clinical forms of coronary artery disease - myocardial infarction. The definition of KCC in the conditions of free movement activity is an important state task.

Consider the features of arrhythmias and myocardial infarction.

Cardiac arrhythmia - standard form of heart disease characterized by the violation frequency and the frequency of generation of the excitation pulses, often manifested against the rhythm of cardiac contractions. In ordinary life, when the heart is all right, man, as a rule, he does not feel it beating, does not perceive his rhythm, and with the appearance of arrhythmia clearly felt interruptions, the sinking of the heart or a sharp chaotic heartbeat. Disruption of the normal contractile activity of the heart can lead to a number of serious complications.

Classification of arrhythmias [4]:

I Arrhythmia associated with impaired automaticity:

1) Sinus arrhythmia;

2) Sinus bradycardia;

3) Sinus arrhythmia;

4) Respiratory arrhythmia;

5) Atrioventricular (nodal) rhythm;

6) Idioventricular rhythm;

7) Dissociation with the interference.

II is ramie, associated with impaired conduction:

1) Extrasystole;

2) Paroxysmal tachycardia;

3) Atrial fibrillation;

4) ventricular Fibrillation.

III Arrhythmia associated with impaired conduction:

1) Sinoauricular blockade;

2) Vnutriepreserdna blockade;

3) Atrioventricular block (sometimes 3 degrees);

4) Intraventricular blockade (legs and beam GIS).

Sinus tachycardia - increased heart rate greater than 90 beats per minute while maintaining the correct sinus rhythm.

Reason: activation CAC, increased body temperature and the environment, hyperthyroidism, physical activity, emotional excitement.

Sinus bradycardia - ischemia heart rate less than 60 beats per minute (but not below 40 beats per minute) while maintaining the correct sinus rhythm.

Causes: increased vagusnye influences the attenuation of sympathetic influences, lowering body temperature and the environment, hypothyroidism, hypoxia, intoxication.

Atrioventricular block is 3 degrees:

Grade I - PQ>0,20 s (normal PQ=0,12-0,20)

II degree is divided into 3 types:

1 - loss of QRS complex after the gradual lengthening of interval PQ. This blank period is called the period Samoilov-Winkenbach;

2 - loss of QRS complex without prior lengthening of interval PQ;

3 - loss of each 2, 3, etc. whom the QRS complex, 2 atrial contraction - 1 contraction of the ventricle.

III degree - full cross block, the Atria contract in his regime, poly - his, independently from each other. Develops a pronounced bradycardia.

Myocardial infarction is a severe disease characterized by the death of a part of the contractile myocardial cells with subsequent substitution of the dead (necrotic) cells coarse connective tissue. The prognosis is unfavorable, after the occurrence of myocardial infarction in developing irreversible ischemic changes that may lead to complications of varying severity, often with fatal outcome [5].

Conventional ECG signs of myocardial infarction are:

1) No R-wave in leads located above the region of the heart;

2) the Appearance of pathological Q wave in leads located above the region of the heart;

3) the Rise of the segment S-T above the contours leads located above the region of the heart;

4) the offset of the segment S-T below contours in leads opposite region of the heart;

5) Negative prong T in leads located above the region of the heart.

In table 2 (see figure 3b) shows the localization of myocardial infarction according to the FORMER [5].

It should be noted that the specificity and sensitivity of the ECG method awsumsauce not absolute. It is known that the electrocardiographic diagnosis THEY are not specific, i.e. local changes of the electrical processes can be invoked not only ischemic lesions and morphological changes in the myocardium, and with a certain probability cardiomyopathy and hypertrophy of the ventricles. Error electrocardiographic diagnosis of THEM, unfortunately, possible. When diagnosing THEM can be difficulties associated with the analysis of the initial part of the QRs complex, reflecting the depolarization of the ventricles (QRS complex), and the difficulties of interpretation of the changes in the terminal portion of QRs complex elements of ventricular repolarization (ST interval and spike T). According to various authors [6], not promptly diagnosed from 10 to 42% of cases to THEM. The sensitivity of some ECG signs of acute MI (AMI): prong ST - 54%, abnormal Q wave is 31%.

Mortality in patients with AMI is largely determined by its area:

- mortality in extensive AMI (more than 50% of the working surface of the left ventricle) is 44%;

- mortality, with an average area of AMI (30% to 50% of the working surface of the left ventricle) is 34%;

- the fatality rate is not larger AMI (less than 30% of the working surface of the left ventricle) is 22%.

Thus, from the description of the invention, when the registration of the FORMER in the known device is not taken into account breakage electr the species and detection of a critical state of the patient's heart.

The invention is directed to the extension of functionality by detecting a breakage of the electrodes and the critical state of the heart in conditions free of motor activity.

This is achieved by the fact that in the device for recording of electrocardiogram containing the amplifier, analog-to-digital Converter with multiplexer and connected in series block decomposition, the second arithmetical and logic unit, arithmetic unit, the analyzer code increment, a switch unit and a digital modem and control unit, the first and second memory blocks, the counter code number increment, and the second output of the second arithmetical-logical unit connected to the second input of the block decomposition, the output of the second memory block is connected with the second input of the second arithmetical-logical unit, the second output of the analyzer code increment connected to the first input of the first memory block, and the third output to the first input of the counter code number increment, the output of which is connected with the second input of the first memory block, the output of which is connected with the second input of the switch unit, the first, second, third, fourth, fifth and sixth outputs of the control unit are connected respectively to the second input of the analog-to-digital Converter with multiplexer, the third input unit decomposes and, the input of the second memory block, the third input of the second arithmetical-logical unit, the second input of the counter code number increments and the third input of the switch unit, introduced the breakage detection unit electrodes and the block determining the critical condition of the heart, and are connected to the amplifier, the power failure detection electrodes, analog-to-digital Converter with multiplexer unit determining the critical condition of the heart and the block decomposition, while the seventh output control unit connected to the fourth input of the switch unit, the second output unit failure detection electrodes connected to the first input of the control unit, the second input is connected with the second output unit determining the critical condition of the heart, and the second output of the second memory block is connected with the second input of the determination of the critical condition of the heart.

Thus the breakage detection unit electrodes contains a block of the reference voltage, the unit generating the driving signal and the comparator, and the input of the breakage detection unit electrodes connected to the first input of the comparator and the first output of the breakage detection unit electrodes, a second comparator input coupled to the output unit generating a driving signal, and the output of the comparator is connected with the second output of the breakage detection unit electr the Dov, the output of reference voltage connected to the first input of the comparator.

The block determining the critical condition of the heart contains the block allocation information settings electrocardiograma, block definitions arrhythmia and block definitions of myocardial infarction, the first input unit determining the critical condition of the heart is connected with the input of block allocation information settings electrocardiograma and the first output unit determining the critical condition of the heart, the output of block allocation information settings electrocardiograma connected with the first inputs of the block definition arrhythmia and block definitions of myocardial infarction, second input which is connected to the second input of the determination of the critical condition of the heart, and the outputs from the second output unit determining the critical condition of the heart.

Put the blocks and their relationships are new properties that achieve the purpose of the invention.

The essence of the invention lies in the definition of infringement of contact of the electrode-skin and the critical state of the heart in conditions free of motor activity.

If in the known device during registration of the FORMER does not take into account the possibility of breakage of the electrode and finding a heart of a patient in critical condition, the proposed device will show the change check for breakage of electrodes, myocardial infarction and arrhythmias.

According to the authors of the present invention, when registering EX under free movement activity should be used in the device registration EX blocks breakage detection electrodes and determining the critical condition of the heart. This approach will allow us to eliminate breakage of the electrodes upon detection of which the device in a timely signals and switches from low energy consumption, and to monitor the critical condition of the patient's heart in real time.

The figure 6 shows a diagram of the proposed device to check electrocardiogram.

The figure 7 shows the block circuit diagram of the failure detection.

The figure 8 shows the representation of the breakage detection unit in the Multisim simulation environment.

The figure 9 shows the simulation results of the breakage detection unit electrodes.

The figure 10 shows the block circuit diagram of the determination of the critical condition of the heart.

The figure 11 shows the diagram of the algorithm operation unit determining the critical condition of the heart.

The figure 12 shows a graphical representation of the determination of the parameters of the critical state of the heart.

The authors propose to use the device blocks the detection of breakage of the electrodes and determine critical sostojanija. The proposed device for registration of electrocardiogram in the conditions of free movement activity contains:

1 - power, 2 - analog-to-digital Converter with multiplexer, 3 - block decomposition, 4 - second arithmetical-logical unit, 5 - arithmetic unit, 6 - analyzer code increment 7 - block switch, 8 - digital modem, 9 - control unit, 10 - second memory block, 11 - meter code number increment 12 - the first block of memory, 13 - breakage detection unit electrodes, 14 - unit determination of the critical condition of the heart.

Are connected to the amplifier 1, the breakage detection unit electrodes 13, an analog-to-digital Converter with multiplexer 2, the block determining the critical state of heart 14, the block decomposition of 3, the second arithmetical and logic unit 4, the arithmetic unit 5, the analyzer code increment 6, the switch unit 7 and the digital modem 8, and the control unit 9, the first 12 and second 10 memory blocks, count the number of code increment 11.

The output of block breakage detection electrodes 13 connected to the input of the control unit 9, the second output of the second arithmetical-logical unit 4 is connected with the second input of the block decomposition 3, the output of the second memory block 10 is connected with the second input of the second arithmetical-logical unit 4, the second output of the analyzer is the infeed increment 6 connected to the first input of the first memory block 12, and the third output to the first input of the counter code number increment 11, the output of which is connected with the second input of the first memory block 12, the output of which is connected with the second input of the switch unit 7, the first, second, third, fourth, fifth, sixth and seventh outputs of the control unit 9 are connected respectively to the second input of the analog-to-digital Converter with multiplexer 2, the third input of the block decomposition 3, the input of the second memory block 10, a third input of the second arithmetical-logical unit 4, the second input of the counter code number increment 11, the third input of the switch unit 7 and the fourth input of the switch unit 7.

The amplifier 1 is designed for amplification of the signals leads. Analog-to-digital Converter with multiplexer 2 is designed to convert a lead signals from analog form to digital form. The block decomposition 3 is designed to implement step-by-step mode decomposition of a signal in an empirical fashion (EM). The second arithmetical and logic unit 4 is designed to hold EM, thresholding EM to reduce the intensity of high-frequency interference and check the stop condition. The first arithmetic unit 5 is for forming, for each assignment of the difference between the current and the previous code samples. The code analyzer increments of 6 intended, first, the separation of the received code increment into two parts: the first part consists of two least significant bits of the code increments and significant digits (3 digits), the second part of the remaining six high-order bits of code increments, and, secondly, to analyze the second part of the received code increment. The switch unit 7 is designed to connect the output of either of the analyzer code increments of 6, or the first memory unit 12 to the input of a digital modem 8. Digital modem 8 is designed for the transmission of information via communication channels. The control unit 9 is designed to synchronize and control the operation of the blocks of the device. The second memory block 10 is designed to store threshold values stop. Counter code number increment 11 is designed to determine the number of the current code increment. The first memory block 12 is designed to store the values of the second part of the code increments under the condition different from zero at least one category.

Put the power failure detection electrodes and the block determining the critical condition of the heart provide prevention retrieve artifacts pulses on the electrocardiogram and the discovery of a critical condition of the heart send information about the patient's condition in real time.

Let us consider the work put blocks.

The detection unit of the OBRs is and electrodes contains (see figure 7): 18 - unit generating a driving signal, a 19 - block of the reference voltage, 20 - Comparer.

Series-connected unit driving signal 18 and comparator 20. The output unit generating a driving signal 18 is connected to the input of the breakage detection unit electrodes 15, the first output unit failure detection electrodes 16 and the first input of the comparator 20, the second input of the comparator 20 is connected to the output of the reference voltage 19, the output of comparator 20 is connected with the second output unit failure detection electrodes 17.

The block generating the driving signal 18 is designed to generate a signal representing a constant current for detecting breakage of the electrodes. Unit reference voltage 19 is designed to supply the reference voltage to the comparator 20. The comparator 20 is intended for fixation of abrupt change in voltage at the input of the breakage detection unit electrodes 15.

The breakage detection unit of the electrodes operates as follows.

Block circuit failure detection electrodes in the Multisim environment and modeling work its prototype is shown in Fig. 8 and 9, respectively. At the precipice of one of the electrodes (the opening of one of the keys chain) will trigger an indicator that would indicate a breach in the lead system.

The excitation signal is a DC current, which is can be generated by current sources, or using resistors connected to the potential supply. When the breakage of the electrode there is a saturation of the channel and the input voltage of the comparator becomes close to the supply voltage. The second comparator input is connected to a source of reference voltage, which selects the lower voltage device and greater than the maximum input voltage from the electrodes. If the voltage at the first comparator input is greater than the second, then the voltage at the output of the comparator will indicate the breakage of the electrode.

Thus, in the proposed device for registration of electrocardiogram under free motor activity is controlled breakage of the electrodes.

Next, we consider the work of the unit determination of the critical condition of the heart.

The block determining the critical condition of the heart contains (see figure 10): 25 - block allocation of informative parameters of electrocardiogram, 26 - unit definition of arrhythmia, a 27 - unit definition of myocardial infarction.

The output of block allocation of informative parameters 25 is connected with the first inputs of the block definition arrhythmia 26 and block definitions of myocardial infarction 27, the output of the second memory block 10 is connected with the second inputs of the block definition arrhythmia 26 and block definitions of myocardial infarction 27.

Unit definition arrhythmia 26 of the situation of the t of the block definition tachycardia 34, unit definition aetiology 35, block definitions AB-blockade 36 and the first block OR 37. Unit definition of myocardial infarction 27 consists of a block parameter definitions tooth "q" 38, block parameter definitions tooth "R" 39, block determine the offset of segment ST 40, block parameter definitions tooth "T" 41 and the second unit "OR" 42. The outputs of the first block OR 37 and the second unit "OR" 42 United in the output unit determining the critical condition of the heart 24. The authors intentionally did not put the third block "OR" combining outputs of the first block OR 37 and the second unit "OR" 42 that the doctor was the choice of treatment method.

Unit definition arrhythmia 26 and the block definition of myocardial infarction 27 operate on the principle of comparing the options electrocardiograma with normal values are shown in table 1 (see figure 3a). If the settings electrocardiograma deviate from the normal values are not many and are in the green zone (see figure 12), the block determining the critical condition of the heart does not send an alarm signal if the parameters start to deviate more and are in the yellow zone, the block determining the critical condition of the heart sends a warning signal, if the parameters of electrocardiograma are in the red zone unit determining the critical condition of the heart sends Trevor the output signal.

The proposed device for registration of electrocardiogram works as follows.

Previously, the user defines the criteria for stopping by accretion in the second memory block 10 threshold shutdown. Then the control unit 9 are formed control and address signals which are fed to corresponding inputs of a block device to register electrocardiogram.

The clock pulses from the output of the control unit 9 is fed to the input of analog-to-digital Converter with multiplexer 2, so that at its output and, respectively, at the input of the block decomposition 3 codes appear amplitudes EX sequentially in each lead. The block decomposition 3 together with the second arithmetical-logical device 4 form for EX each assignment of a set of empirical fashion.

Code samples obtained empirical fashion with the output of the second arithmetical-logical unit 4 is fed to the input of arithmetic unit 5 that generates for each of these code samples the difference between the current and the previous reference, and thus to the input of the analyzer code increment 6 receives 8-bit code increment signal with the sign (the 9th bit) sequentially for each abstraction. At the same time from the output of the control unit 9 clock pulses arrive at the counting input of the counter number to the Yes increment 11, resulting at the output of the counter 11 is formed code numbers calculated increment signal, i.e. its temporal coordinate.

In the code analyzer increments 6 separates the received code increment into two parts; two minor category code increment and its sign bit (just 3 digits) via the input switch unit 7 is transferred directly to the digital modem 8 and further to the communication channel and transmitted to the receiving end. The values of the remaining six high-order bits of code increments are analyzed and if it is different from zero at least one discharge through the output unit 6 of the code analyzer increments of these 6 bits are sent to the input of the first memory block 12, where remembered. At the same time under the condition different from zero the analyzer block codes increments 6 generates a write command time coordinates coming from the analyzer 6 to the input of the counter code number increment 11, which is determined by the number of the current code increment (time coordinate).

If all 6 high-order bits of the incoming code increment equal to zero, then the two lower significant bits of the code increments as before, go on line for transmission, and the code analyzer increments of 6 waiting for the next code increment.

The procedure takes place until, until the end of the specified time of registration of the FORMER, which determine eleesa duration of the time interval, released by a control unit 9. At the end of the registration interval control unit 9 stops the supply of clock pulses to the inputs of blocks 2, 3, 11, completing their work. He then gives a command to the input of the switch unit 7, connecting the input of the modem 8 to the output of the first memory block 12 and starting the transfer of the memory contents, i.e., learned senior level codes increment and time coordinates.

The positive effect of the proposed device for registration of electrocardiogram in the conditions of free movement activity is timely identification of violations contact the electrode-skin and the critical state of the heart in conditions free of motor activity.

Other positive effects are that the device for recording of electrocardiogram in the conditions of free movement activity can operate in real-time upon detection of a critical state of the patient's heart and in the low power mode upon detection of breakage of the electrodes.

Another feature of the invention lies in the fact that the input blocks and their connections are properties that allow you to register the EX define and set one of the modes in which to operate the device:

- in normal mode to conserve power is the power the device for recording the FORMER in terms of free movement activity will send the FORMER to the server in the interval, specified by the user, for timely determination of the critical state of the heart:

in real time, if you find the critical state of the patient's heart;

in the low power mode, in which the device for recording the FORMER in terms of free movement activity means upon detection of breakage of the electrodes.

Thus, the proposed device for recording the FORMER allows you to prevent getting artifacts on registered EX and upon detection of the critical condition of the heart to provide information about the patient's condition in real time.

New properties of the present invention extend its functionality under the conditions of free movement activity. While retaining the advantages of the known device for recording electrocardiogram.

List of used sources

1. Pat. 2008796 Russian Federation. Device for registration of electrocardiogram / Baum O. C., Kostov, K., Popov, L. A. No. 4915949/14, Appl. 04.03.1991; publ. 15.03.1994, bull. No. 28.

2. Polikar R. Introduction to the wavelet transform. TRANS. Gribunin Century, SPb, avtex. URL: http://www.twirpx.com/file/37382/ (date of access 11.01.2013).

3. Pat. 2452364 Russian Federation. Device for registration of electrocardiogram / Bodin, O. N., Krivonogov L. Yu, Poking Y. A.,Churakov PP No. 2010145834/14, Appl. 10.11.2010; publ. 10.06.2012, bull. No. 16.

4. Mandel C. J. Heart arrhythmia. Mechanisms, diagnosis, treatment. In 3 volumes. - M.: Medicine, 1996.

5. Sudbino Y. I. Alphabet ECG. - M.: Phoenix, 2003.

6. Slater D. K., Hiatky M. A., Mark, D. B. et al. Outcome in suspected acute myocardial infarction with normal or minimally abnormal admission electrocardiograp.

1. Device for registration of electrocardiogram in the conditions of free movement activity that contains an amplifier, an analog-to-digital Converter with multiplexer and connected in series block decomposition, the second arithmetical and logic unit, arithmetic unit, the analyzer code increment, a switch unit and a digital modem and control unit, the first and second memory blocks, the counter code number increment, and the second output of the second arithmetical-logical unit connected to the first input of the block decomposition, the output of the second memory block is connected with the second input of the second arithmetical-logical unit, the second output of the analyzer code increment connected to the first input of the first memory block, and the third output to the first input of the counter code number increment, the output of which is connected with the second input of the first memory block, the output of which is connected with the second input of the switch unit, the first, second, third, fourth, fifth and sixth outputs of the control unit is connected with the NGOs to the first input of the analog-to-digital Converter with multiplexer, the second input of the block decomposition, the input of the second memory block, the third input of the second arithmetical-logical unit, the second input of the counter code number increments and the third input of the switch unit, characterized in that the breakage detection unit electrodes and the block determining the critical condition of the heart, and are connected to the amplifier, the power failure detection electrodes, analog-to-digital Converter with multiplexer unit determining the critical condition of the heart and the block decomposition, while the seventh output control unit connected to the fourth input of the switch unit, the second output unit failure detection electrodes connected to the first input of the control unit, the second input is connected with the second output unit determining the critical condition of the heart, and the second output of the second memory block is connected with the second input of the determination of the critical condition of the heart.

2. Device for registration of electrocardiogram under free motor activity in p. 1, characterized in that the breakage detection unit electrodes contains a block of the reference voltage, the unit generating the driving signal and the comparator, and the input of the breakage detection unit electrodes connected to the first input of the comparator and the first output of the breakage detection unit is of lektroluv, a second comparator input coupled to the output unit generating a driving signal, and the output of the comparator is connected with the second output of the breakage detection unit electrodes, the output of reference voltage connected to the first input of the comparator.

3. Device for registration of electrocardiogram under free motor activity in p. 1, wherein the block of determining the critical condition of the heart contains the block allocation information settings electrocardiograma, block definitions arrhythmia and block definitions of myocardial infarction, the first input unit determining the critical condition of the heart is connected with the input of block allocation information settings electrocardiograma and the first output unit determining the critical condition of the heart, the output of block allocation information settings electrocardiograma connected with the first inputs of the block definition arrhythmia and block definitions of myocardial infarction, second input which is connected to the second input of the determination of the critical condition of the heart, and the outputs from the second output unit determining the critical condition of the heart.



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to paediatric cardiology and paediatric infectious diseases, and can be used for evaluation of indications for cardiometabolic therapy in case of infectious affection of myocardium in children. For this purpose quantitative evaluation of clinical, electrocardiographic, biochemical and echocardiographic indices is determined and realised. As clinical indices auscultative symptomatic: sonority of tones, presence of noises, parameters of arterial pressure are evaluated. As biochemical indices evaluated are: activity of cardiospeciphic enzymes: MB-fraction of creatine phosphokinase, α-hydroxybutyrate dehydrogenase, aspartic transaminase, alanine transaminase and cardiospecific troponin I protein. Echocardiographic examination is realised with application of Dopplerography for evaluation of diastolic ventricular function. Each of indices is evaluated by from 1 to 3 points. Points are summed up and obtained result is used to evaluate indications for cardiometabolic therapy. If the total sum is lower than 3 points, cardiometabolic therapy is not indicated. If the total sum is from 3 points to 7 point including, peroral introduction of cardiometabolic preparations is carried out. If the total sum is from 8 points and higher, parenteral introduction of cardiometabolic preparations is realised.

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1 tbl, 4 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to non-invasive techniques for qualitative-quantitative analysis of the cardiovascular functional state. A pulse signal and an electric heart signal are recorded for 2-3 minutes. The slow waves are recovered from two heart signals; slow-wave spectra are detected in two channels. The windowed Fourier transform is used to calculate spectral ratio powers of the slow waves of the heart signal in the second-order slow-term within the range of 0.01 to 0.05 Hz, in the first-order slow-term within the range of 0.05 to 0.15 Hz, in the respiratory component within the range of 0.15 to 0.5 Hz. The derived data are used to form six informative criteria X…X6. As the heart signal recorded in one of the channels, a heart rate is calculated and used as the seventh informative criterion. The generated seven-element vector of the informative criteria is supplied to an input of a trained neuron network, outputs of which correspond to the allocated classes of the cardiovascular diseases.

EFFECT: technique enables early diagnosing aiming at preventing the disease progression, thereby preventing an increase of the primary hypertension incidence by analysing two heart signals.

3 cl, 9 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: recording ECG is followed by a perianal block with an anaesthetic solution in an amount of 10.0-15.0 ml. Then 60-90 min later ECG is recorded once again, and this recording is compared to the pre-block recording. If observing a positive dynamics of the ECG results, ischemia caused by the anorectal cardioinhibitory reflex is diagnosed. No positive dynamics observed enables diagnosing cardiogenic myocardial ischemia.

EFFECT: method makes it possible to perform the more accurate differential diagnosis of the above pathologies by following a specific procedure in case of pain syndrome in the given category of patients.

1 ex

FIELD: medicine.

SUBSTANCE: recording ECG is followed by a bilateral translumbar block with an anaesthetic solution in an amount of 120-140 ml from each side. Then 60-90 min later ECG is recorded once again, and this recording is compared to the pre-block recording. If observing a positive dynamics of the ECG results, ischemia caused by the enteral cardioinhibitory reflex with underlying intraluminal intestinal hypertension is diagnosed. No positive dynamics observed enables diagnosing myocardial ischemia caused by a cardiac pathology.

EFFECT: enabling performing the more accurate differential diagnosis of the above pathologies by following a specific procedure in case of pain syndrome in the given category of patients.

1 ex

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical equipment. In the method realisation ECG graphs and graphs of tracks of coordinates of the heart electric activity source are built in the system of coordinates, connected to electrodes on the patient's body. After that, the time "zone of beginning" of a P/Q impulse is identified. In the "zone of beginning" a time ECG track is approximated and an intersection of an approximated curve with an isoline is found to determine the time moment of the point of P/Q "beginning". The determined time moments of the "beginning" points are transferred onto an initial track of impulses. The origin of the myocardium coordinate system is transferred into the determined point P of the track. Coordinates of the sinus node of the myocardium SU are tied to the track origin for the complex P, and those of the interventricular septum IVS - to the track origin for the impulse Q. The device for the method realisation contains an electrocardiograph, a unit for the identification of the time area of the "beginning" of the impulse P/Q, a unit of fixation of the "beginning" point on the graph of the tracks and a unit of transfer of the primary system of coordinates into the myocardium coordinate system.

EFFECT: group of inventions makes it possible to increase the efficiency of electrocardiographic examination due to an increased accuracy in the measurement of coordinates of the heart electric activity source.

2 cl, 5 dwg

FIELD: medicine.

SUBSTANCE: patient is tested to determine clinical characteristics, each of which is scored to calculate a diagnostic index. The following clinical characteristics are determined: arterial hypertension taking into account its stage and length; diabetes mellitus, its length taking into account the patient's age and complications; ischemic heart disease and its length, cardiac angina, myocardial infarction and its length; the patient's age; compliance; smoking. The absence of any of the above characteristics is scored as 0 points. That is followed by calculating the total score; depending on the derived value, a high, moderate or low probability of the suffered silent stroke is predicted.

EFFECT: method enables establishing the presence of the suffered silent stroke reliably.

3 dwg, 4 tbl, 3 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to physiology and dermatovenerology, to diagnostic technique for a risk of developing pitted keratolysis accompanied by stress as an uncurable element of the professional environment for the purpose of the goal-oriented prevention of the above disease in the individuals having hazardous occupations. A heart rate variability is examined twice - before and 15 minutes after a hot test on a plantar surface. If observing no decrease of the LF/HF value as compared to the reference, a risk of developing stress-induced pitted keratolysis is diagnosed.

EFFECT: technique provides more accurate diagnosis of a risk of developing stress-induced pitted keratolysis by examining the heart rate variability and using the hot test.

1 dwg, 2 tbl, 2 ex

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment. A device for suppressing a power-frequency noise effect on an electric cardiosignal comprises a TR-segment time domain selection unit (2), a key element (8), a filter (14), an amplifier (15), a delay unit (16) and a subtract unit (17). An input of the device is connected to the first input of the key element and an input of the delay unit; an output of the device is an output of the subtract unit. The device comprises an electric cardiosignal second derivative forming unit (1), a comparator (3), an RS-trigger (4), an AND circuit (5), a binary counter (6), a decoder (7), second (9), third (10), fourth (11) and fifth (12) key elements and a scaling amplifier (13).

EFFECT: using the invention enables the higher noise resistance of the analysed electric cardiosignal without misrepresenting information components.

8 dwg

FIELD: medicine.

SUBSTANCE: diagnostic technique for the ischemic heart disease is implemented by stating risk factors, symptoms and ECG findings, diagnostic characters (DC) of which are distributed into groups and assigned with certain numerical scores. Conditional probabilities of the presence or absence of IHD in a specific patient are calculated. The findings are used to establish the diagnosis of IHD or not.

EFFECT: technique enables providing establishing the more accurate diagnosis of IHD by taking into account a complex of various DCs, the records of which are processed by a mathematical model.

2 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to diagnostics and physiology. The RR intervals are recorded, and the derived sequence is processed. The RR sequence length is specified not less than 300 sec. That is followed by dividing the RR sequence into data windows A1…An of the length of 75 sec≤A≤300 sec at a window shift pitch B of 1 sec≤B≤10 sec. Further, for each data window: the frequency Fourier transform is used to derive power distribution of the initial window; the derived power distributions are integrated at all frequencies within not less than 0.015-0.6 Hz to produce total power TP of the heart rate variability; low frequency power PLF is calculated by not less than 0.04-0.15 Hz; high frequency power PHF is calculated by not less than 0,15-0.6 Hz; the relation PLF/PHF is calculated; the derived TP sets and PLF/PHF relations are normalised to produce standard values X1…n of the derived TP sets and standard values Y1…n of the PLF/PHF set. That is followed by calculating a synchronism analysis function of each data window f1…n=(sinX1…n-sinY1…n)/|sinX1…n-sinY1…n|. The presence or absence of the stress condition is stated by analysing the derived values f1…n.

EFFECT: method enables providing more reliable diagnosis of the beginning individual's stress condition by analysing the RR interval.

2 ex, 1 dwg

FIELD: medicine.

SUBSTANCE: method involves carrying out pulsating Doppler echocardiographic examination. Mean pressure is determined in pulmonary artery. Mean pressure in pulmonary artery being less than 13 mm of mercury column, no cardiac rhythm disorders risk is considered to take place. The value being greater than 13 mm of mercury column, complex cardiac rhythm disorder occurrence risk is considered to be the case.

EFFECT: accelerated noninvasive method.

1 tbl

FIELD: medicine; medical engineering.

SUBSTANCE: method involves selecting reference point in every cardiac cycle on TP-segment. Values of neighboring N=2n+1 reference points also belonging to TP-segment are recorded, n=1,2,…, beginning from the first reference point. Other reference points are set to zero. The central reference point value is left without changes in a group of 2n+1 member. Reference point values of each of n pairs of reference points symmetrically arranged relative to the central reference point are scaled relative to condition Uj=U0Kj, where U0 is the central reference point amplitude, Uj is amplitude of j-th reference point pair, j=1,2,…,n is the number of each reference point pair relative to the central reference point, Kj is the scaling coefficients determined from received signal suppression condition of the first n spectral zones in spectrum. The so formed electrocardiogram signal reference point groups sequence is let pass through lower frequency filter with isoline drift signal being obtained being produced on output. The signal is amplified and subtracted from the initial electrocardiogram signal that is preliminarily delayed for lower frequency filter delay time. Device has the first lower frequency filter, discretization unit and unit for selecting anchor reference points connected in series, as well as subtraction unit, unit for saving N reference points, scaling unit, the second lower frequency filter, amplifier and delay unit. Output of the unit for selecting anchor reference points is connected to the first input of memory unit the second input of which is connected to discretization unit output. Each of N memory unit outputs is connected to one of N inputs of scaling units. Scaling unit output is connected to the second lower frequency filter input which output is connected to amplifier input. Amplifier output is connected to the first input of subtraction unit, the second output of subtraction unit is connected to delay unit output. Its input is connected to output of the first lower frequency filter. Subtraction unit output is the device output.

EFFECT: reliable removal of isoline drift.

2 cl, 8 dwg

FIELD: medicine; cardiology.

SUBSTANCE: device has amplifier, analog-to-digital converter provided with multiplexer, arithmetic unit, memory unit, digital modem, increment code analyzer, increment codes number counter, switching unit and control unit as well as second memory unit, digital filtration unit and decimation unit. Electrocardiogram signal is registered within frequency-time area. Increase in volume of diagnostic data is provided due to time localization of spectral components of electrocardiogram signal.

EFFECT: widened operational capabilities; improved precision of diagnosing; higher efficiency of treatment.

6 dwg

FIELD: medicine; radio electronics.

SUBSTANCE: device for taking cardiogram has set of electrodes, cardiologic unit, analog-to-digital converter, cardio signal preliminary treatment unit, computer, lower frequency filter, differentiator, functional converter and controlled filter. Power function calculation units are not included. Preliminary continuous filtering of cardio signal entering the computer is provided.

EFFECT: simplified design; improved precision of measurement.

1 dwg

FIELD: medical engineering.

SUBSTANCE: device has electrodes, input amplifier, unit for protecting against error influence when applying medical electric instruments, low frequency filter, signal analysis unit, unit for eliminating isoline drift and electric power supply units.

EFFECT: high accuracy in plotting rhythmograms; improved instruments manipulation safety.

1 dwg

FIELD: medicine.

SUBSTANCE: method involves modeling real three-dimensional patient heart image based on electrocardiogram and photoroentgenogram data and determining basic functional values of its myohemodynamics.

EFFECT: high accuracy and reliability of the method.

2 cl, 5 dwg

FIELD: medicine.

SUBSTANCE: method involves recording cardiac biopotentials with vector electrocardiograph, processing and visualizing signal with graphical plane integral cardiac electric vector projections (vector electrocardiograms) being built and analyzed. Shape, QRS-loop value and vector orientation-recording process are determined. Analysis is based on planar vector electrocardiograms in horizontal, frontal and sagittal planes and in spatial 3-D-form. Vector loop direction is studied in X-,Y-,Z-axis projections, values, dynamics and localization are evaluated in resulting integral cardiac electric vector delta-vector space. To do it, QRS-loop is divided into four segments, one of which characterizes excitation in middle part of axial partition surface, the second one is related to excitation in lower ventricular septum one-third with cardiac apex being involved and the third and the fourth one is related to excitation in basal parts of the left and right heart ventricles. Delta-vector existence and its magnitude are determined from changes in loop segment localization when compared to reference values.

EFFECT: improved data quality usable in planning surgical treatment.

4 dwg

FIELD: medical radio electronics.

SUBSTANCE: device can be used for testing cardio-vascular system of patient. Differential vector-cardiograph has high frequency oscillator, common electrode, unit for reading electrocardiogram and radio cardiogram provided with amplification channels and filtration channels, multiplexer, microprocessor unit with common bus, analog-to-digital converter, keyboard, mouse and indication unit. Device provides higher precision of measurements due to usage of electric component heart activity and truth of diagnostics due to ability of representation of results of testing in form of variety of vector-cardiograms in real time-scale.

EFFECT: improved precision.

1 dwg

FIELD: medicine, cardiology, arhythmology, functional diagnostics.

SUBSTANCE: one should register electrocardiogram in esophagus, apply an electrode in a site where the maximum signal amplitude is registered, increase the signal 5-fold, not less to be filtered in the range of 0.5-40 Hz to be registered at the rate of 100 mm/sec, not less. The time for intra-atrial process should be measured from the beginning of ascending part of the first positive wave of pre-P-tooth up to the top of the second adhesion of P-tooth; the time for inter-atrial process should be measured from the site of crossing a descending part of the first positive wave and the onset of obliquely ascending pre-P-interval up to crossing this interval with the point of abrupt increase of the first phase of P-tooth. The innovation provides more means for noninvasive evaluation of intra- and inter-atrial stimulation process.

EFFECT: higher accuracy of evaluation.

3 dwg

FIELD: medicine, cardiology.

SUBSTANCE: one should register a standard electrocardiogram (ECG) and measure the duration of a "P"-wave. Moreover, it is necessary to conduct daily ECG monitoring to calculate single, paired and group atrial extrasystoles. Then one should calculate diagnostic coefficient DC by the following formula: DC=DC1+DC2+DC3+DC4, DC1 =-8.8 at duration of "P"-wave below 106 msec, 9.3 at duration of "P"-wave above 116 msec, -3.5 at duration of "P"-wave ranged 106-116 msec. DC2=-1.9 at the absence of group atrial extrasystoles during a day, 8.3 -at daily quantity of group atrial extrasystoles being above 4, 2.5 - at daily quantity of group atrial extrasystoles ranged 1-4. DC3=-2.9 at daily quantity of paired atrial extrasystoles being below 3, 8.1 - at daily quantity of paired extrasystoles being above 35, -1.4 - at daily quantity of paired atrial extrasystoles ranged 3-35. DC4=-5.1 at daily quantity of single atrial extrasystoles being below 15, 4.3 - at daily quantity of single atrial extrasystoles being above 150, -1.0 - at daily quantity of single atrial extrasystoles ranged 15-150, if DC is above or equal to 13 one should diagnose high risk for the development of paroxysmal atrial fibrillation, in case if DC is below or equal -13 it is possible to diagnose no risk for the development of paroxysmal atrial fibrillation, and if DC is above -13 and below 13 - the diagnosis is not established.

EFFECT: higher sensitivity of diagnostics.

5 ex

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