Method for studying daily monitoring curves of human blood pressure

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely cardiology, normal physiotherapy, pathological physiotherapy. A daily curve of blood pressure is recorded. It is followed by spectral analysis by the method of continuous wavelet transformation. A frequency power of the blood pressure curve a is determined in the moment b by mathematical formula. Scalograms are drawn on the basis of the wavelet coefficient on the segment [bj, bj] by mathematical formula. Physiologically relevant frequency ranges are selected at the scalograms on the basis of distances between adjacent local minimums on the scalogram curve by formula.

EFFECT: method provides weak influence of vegetative nervous system and humoral effects on the blood pressure curve at the various stages of ontogenesis, in health and disease, both in rest, and in transition processes.

1 ex, 2 dwg

 

The invention relates to medicine, namely cardiology, normal physiology, pathological physiology.

There is a method of study results of Smad using standard indicators HELL, slightly expanding the range of application of statistical methods (calculation redeclaration deviation, regression residuals), or analysis in the time domain (the area index in different versions) [Ivashkin T.V. and others, 2001; Stamler J. and others, 2003; Kurina NN. and others, 2004; Katerina I.M. and others; 2004 Solov'ev N.V. and others, 2006; Andreev PV 2007]. Spectral analysis is quite rare, due to a number of reasons associated with the nature of the signal: a small number of samples, a large number of gaps, uneven sampling frequency.

Most similar to our proposed method is a method of application of the wavelet transform for analysis of heart rate variability in children (RU # 2241374, IPC A61B 5/0452, 5/02, 10.12.2004). This method consists in the fact that the original curve of heart rate variability is subjected to the continuous wavelet transform with subsequent processing of the matrix of coefficients of the wavelet transform to identify the dynamics of the wavelet power density in a physiologically relevant ranges. The disadvantage of this method is primarily nevozmozhno the ü dynamic allocation physiologically relevant ranges. In other words, the sharing of a common signal spectrum sub-bands, performs according to pre-fixed values, without considering changes in the structure of the signal itself.

The task of the invention is to improve the assessment of autonomic regulation of heart rate variability of a person.

The technical result consists in increasing the accuracy and informative way research results Smad person.

The technical result is achieved by means of investigating the Smad person includes registration of parameters of blood pressure and its further spectral analysis using the continuous wavelet transform, which determine the capacity of the frequency dynamics and time b by the formula

where W(a,b) - coefficient wavelet transform; f(t) is the analyzing function; ψ((t-b)/a) is the analyzing wavelet;

building on the basis of the matrix of wavelet coefficients scalogram on the interval [bibj] by the formula

i, j<N, j<i,

where V(a1) - salagrama signal; N is the number of coefficients; ai- scale wavelet transform;

selection on salagrama physiologically relevant frequency bands, according to the invention the selection salagrama physiological significant chlotrimazole is done on the basis of the distances between neighboring local minima on the curve scalogram by the formula

,

where Δ - physiologically meaningful range,

am, an- neighboring local minima on the curve scalogram;

determining values of wavelet power density (VPM) U in each of the frequency bandsis carried out according to the formula

the definition changes wavelet power density in time as U(t);

the definition of change of frequency ranges in time as Δa(t);

determining the value of the specific wavelet power density U' in time according to the formula

which reflects the dynamics of change in HELL.

Scalogram ("energy" diagrams) are based on a matrix of wavelet coefficients, defined as the average of the squares of the coefficients W(a, b) for a fixed parameterandon the interval [bibj]. As a function of scale, salagrama reflects the same information as the spectral power density of the Fourier transform, which is a function of the frequency. As you know, the wavelet transform has the advantage, first of all, due to the properties of time-frequency localization of wavelets. The wavelet transform, which represents the time base range, allows to obtain more localized in time energy information. The energy is e chart (scalogram) are based on short-term (on the order of 2-3 measurements) segments, that allows you to track the temporal dynamics of the process.

On salagrama allocate local spectra and physiologically relevant frequency ranges Δ, which is calculated from the distance between the local minima of am, anassociated with different types of mechanisms regulating blood pressure of the person. When identifying the three most important ranges are determined by the two most pronounced minimum, four - three, etc....

The total value of the wavelet power density U reflects the total activity of the nerve centre and is defined in each of the frequency bands.

Specific wavelet power density U' characterizes the specific expression activity in the nerve centre and reflects the process of optimizing the development of AD. The selection of physiologically significant range between the local minima on the curve scalogram associated with different types of mechanisms regulating blood pressure, and assessment of this parameter allow to detect even weak in its effect on blood pressure at different stages of ontogenesis, in norm and pathology, both at rest and during transients that quality improves informative and accurate method for the assessment of Smad person.

Figure 1 shows scalogram four consecutive curve segments Smad; in figure 2 the image is about adaptive separation of the spectrum (scalogram) curve-HELL on frequency ranges, based on the structure of local minima.

Clinical example.

Subject W., 24 years. Height is 173 cm, weight 68 kg Check blood pressure for 22 hours. Measuring step for 5 minutes. The average systolic BP day 134 mm, mean diastolic blood pressure during the day 86 mm, mean systolic blood pressure at night 105 mm, mean diastolic blood pressure at night 67 mm time Index 1%, the index of the measurements is 0%, the degree night reduction of 23%.

Wavelet transform: continuous wavelet transform, wavelet morlet, maximum 64 scale, temporal averaging when building scalogram two blood pressure measurements. The results of the experiment shown in figure 1 and 2. The VPM values are calculated in the frequency ranges between minima on each scalogram.

The data shown in figure 1, obtained by localized spectral analysis indicate that changes frequency components of HRV and show the contribution of different frequencies in the overall picture of HRV.

Method of research the results of daily monitoring of blood pressure of a person, consisting in the Desk during the day of the curve of blood pressure and its spectral analysis using the continuous wavelet transform, including the determination of the power-frequency curve of blood pressure and at the moment lie is no b by the formula

where W(a,b) - coefficient wavelet conversion;
f(t) is the analyzing function;
ψ((t-b)/a) is the analyzing wavelet;
building on the basis of wavelet coefficients scalogram on the interval [bibj] by the formula

where V(a1) - salagrama signal;
N - number of coefficients;
a1- scale wavelet conversion;
selection on salagrama physiologically relevant frequency bands, characterized in that the selection salagrama physiologically relevant frequency bands is based on the distances between neighboring local minima on the curve scalogram by the formula
Δa=am-an,
where Δa is the physiologically relevant range;
am, an- neighboring local minima on the curve scalogram;
determining values of wavelet power density U in each of the frequency bands Δa=[am, an] is carried out according to the formula

the definition changes wavelet power density in time as U(t);
the definition of change of frequency ranges in time as Δa(t);
determining the value of the specific wavelet power density U' in time according to the formula
U'=U(t)/Δa(t).



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention refers to rehabilitation and preventive medicine, cardiology, therapy. It involves drug-induced therapy and a course of cardiorespiratory training with biological feedback (BF) presenting a cardiorhythmography (CRG) and a reference cyclic curve (RCC) to the patient to be matched under continuous visual control. It is followed by active (BF-assisted) and non-active (BF-unassisted) 2-minute tests with the first and last test of each session are non-active (NT). The first NT involves recording reference data of patient's cardiorespiratory system with evaluating the parameters as follows: RCC amplitude, period and continuous component matched with average heart rate on the following active test (AT). The test are automatic, individual for the patient as for the moment of testing with the use of an apparatus for functional psychophysiological correction comprising units described in the patent claim. Each following AT requires forming RCC with the use of average heart rate, amplitude and period on the basis of spectral analysis of CRG and CC of the previous AT. In the beginning of the procedure, the patient is set up to successful completion of the task, 5 s after the beginning of each AT, an audio signal (1 kHz, 300 ms, 30 dB above a threshold of audibility) is supplied. Before the beginning of the course and after each session and the whole course, the patient is tested to determine a level of reactive and personal anxiety and depression by stating the required number of sessions for recovery of cardiorespiratory synchronisation and normal heart rate and blood pressure. Before the first NT and after each AT, capnometry is used to determine the concentration of CO2 in expired air. If observing decrease, respiratory depth is corrected. If maintaining CO2 in expired air after each following AT less than 95% from reference, respiratory depth is corrected during the following AT under control of capnometry to achieve the concentration of not less than 95% from reference. The therapeutic course includes at least 5 sessions, 1 session daily or every second day to recover the respiratory pattern lost due to the disease and the biorhythmological structure of heart rate.

EFFECT: method eliminates subjectivity of the respiratory parameters specified by a searcher, and hyperventilation syndrome due to objective control of respiratory depth with improved heart rate variability.

1 ex, 3 tbl, 3 dwg

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine and medical equipment, namely, to systems of image obtaining, in particular, to computed tomography. In first version of implementation system of image obtaining contains component of window management, which receives ECG signal, which contains premature cardiac cycle and preliminarily obtained X-ray projection data of beating heart. ECGF signal is synchronised with the time of preliminarily obtained X-ray projection data of beating heart. Component of window management places first reconstruction window within the limits of the first cardiac cycle to correspond desirable cardiac phase of preliminarily obtained X-ray projection data, when premature cardiac cycle ensures correspondence of the first reconstruction window to another cardiac phase. Such system contains device of reconstruction which reconstructs projection data, corresponding to multitude of windows of reconstruction of different cardiac cycles to create image data, characteristic of desirable heart phase. In second version of implementation system contains component of window management which deletes first reconstruction window corresponding to suboptimal cardiac phase of preliminarily obtained X-ray projection data of beating heart resulting from abnormal signal in ECG signal. ECG signal is presented in time with preliminarily obtained X-ray projection data of beating heart on multitude of heart cycles, and component of window management adds replacing reconstruction window to optimise set of data for reconstruction, basing on abnormal signal and available preliminarily obtained projection. System also contains reconstruction device which reconstructs set of data for reconstruction in order to create image data characteristic of desirable phase of heart beating. In third version of implementation system contains recommendation component which recommends reconstruction window for cardiac phase within the multitude of preliminarily obtained successive cardiac cycles based on ECG signal and arrhythmia in it, and device of reconstruction, which reconstruct data corresponding to data for each cycle, corresponding to reconstruction window. ECG signal is obtained with simultaneous scanning of beating heart by of computed tomographic scanner. In fourth version of implementation system contains component of window management which automatically changes location or moves first window of reconstruction for cardiac cycle on the basis of premature cardiac cycle within ECG, which is signal synchronised with preliminarily obtained X-ray projection data of beating heart; recommendation component which automatically recommends, at least, one additional reconstruction window, on the basis of premature cardiac cycle; and reconstruction device which reconstructs data, corresponding to reconstruction windows. In order to obtain image received is ECG signal which contains premature cardiac cycle, ECG signal is synchronised in time with preliminarily obtained X-ray projection data of beating heart by multitude of cycles of heart beating. After that, first reconstruction window is moved within the limits of first cardiac cycle, which corresponds to data, different from desirable cardiac phase as a result of premature cardiac cycle. Each from multitude of cardiac cycles contains reconstruction window. Then preliminarily obtained projection data, corresponding to multitude of reconstruction windows, are reconstructed to create image data, characteristic of desirable phase of heart beating. Group of inventions also contains computer-readable data carrier, which stores commands, which, when performed by computer, make computer perform claimed method of image obtaining.

EFFECT: application of claimed group of inventions will make it possible to increase quality of resulting data of reconstructed image.

34 cl, 10 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to pediatrics. In children of pre-school age with tuberculosis of intrathotacic lymph nodes indices of heart rhythm variability are determined: rhythmograms - interinterval differences RMSSD (ms), coefficient of variability CV (%), spectrograms - total spectrum power TR (ms2), very low frequency waves of spectrum VLF (ms2), low frequency waves of spectrum LF (ms2), high frequency waves of spectrum HF (ms2). If their values equal: interinterval differences RMSSD - 76.8±3.92, coefficient of variability CV - 9.9±0.50, total spectrum power TR - 3437±175.3, very low frequency waves of spectrum VLF - 1067±54.4, low frequency waves of spectrum LF - 1003±51.2, high frequency waves of spectrum HF - 1900.2±96,9 vegetative dysfunction is diagnosed.

EFFECT: method increases reliability of diagnostics of impairment of vegetative regulation in children with tuberculosis.

1 tbl, 1 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to pediatrics. Parameters of cardiorhythmogram (CRG) are registered in lying position: at rest - heart rate, SDNN index; tension index (TI); total spectrum power - Total; value of power in range VLF; value of power in range LF; value of power in range HF. After that in standing position reactivity of sympathetic nervous system is determined by Lf/HF index. In five minutes in lying position recovery of initial heart rate, total spectrum power - Total, increase or reduction of initial power in range of waves: VLF, LF, HF are determined. On the basis of CRG indices, it is estimated which type of cardiac rhythm regulation level prevails: reflex or humoral-metabolic; vegetative balance of sympathetic and parasympathetic impact on cardiac rhythm; reactivity of sympathetic nervous system to functional load: adequate or inadequate. Favourable adaptation is predicted if reflex type of cardiac rhythm regulation prevails over humoral-metabolic, at rest balance of sympathetic and parasympathetic impact on cardiac rhythm is determined, under functional load adequate reactivity of sympathetic nervous system is observed. Unfavourable prediction of adaptation is made if reflex type of cardiac rhythm regulation prevails, but at rest sympathetic or parasympathetic impact on cardiac rhythm is observed, under functional load adequate or increased reactivity of sympathetic nervous system is observed. Unfavourable prediction is made if humoral-metabolic type of level of cardiac rhythm regulation prevails, at rest sympathetic impact on cardiac rhythm prevails and under functional load - inadequate: increased or reduced reactivity of sympathetic nervous system is observed.

EFFECT: method makes it possible to increase reliability of prediction of children's adaptation school.

4 tbl, 3 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, pulmonology and perinatology. A pregnant woman suffering bronchial asthma of slight severity, in an attack-free period is examined for the functional state of the vegetative nervous system by cardiorhythmography. Detecting a prevailing effect of the sympathetic nervous system by regional lung rheography technique is used to determine a degree of involvement (%) of a medium region of a left lung in air fill (DOmrll%) and a pulse wave propagation time between the heart and the medium region of the left lung (gamrll). It is followed by a discriminant equation: D=-0.054×DOmrll%-11.781×gamrll. If the value D is equal to or more than -2.55, a baby in a in satisfactory condition is expected to be born, while D being less than -2.55, a baby in asphyxia is predicted.

EFFECT: method provides higher prediction reliability.

1 ex

FIELD: medicine.

SUBSTANCE: invention relates to the field of medicine, namely to methods of heart functional state diagnostics. Cardiorhythmogram is registered, integral and amplitude parameters are determined, their phase characteristics are fixed. As position of phase characteristics vector changes, building of elementary geometric figures of said vector travel on phase plane is carried out. From obtained building of elementary geometric figures number of geometric figures with sides '2', '3', '4',…'15', as well as number of elementary figures "point", reflecting zero increments of R-R cardiointervals are determined, plotting them on diagram of ratings of elementary geometric figures as "1". Presence of pathology is determined if value of number of said figures is higher than 3% from total number of figures.

EFFECT: method extends arsenal of means for control of heart functional state.

14 dwg, 4 tbl

FIELD: medicine.

SUBSTANCE: invention relates to medicine and can be used in cardiology, cardiac surgery, physiology. In patients with ischemic heart disease thermographic examination of upper extremities is carried out. ECG monitoring is performed. Analysis of heart rhythm variability is realised. Test with sublingual introduction of nitroglycerin is carried out. Presence of vasodilating reaction to nitroglycerin is determined by values of temperature of left hand fingers, index of tension (voltage) and RMSSD index.

EFFECT: claimed invention extends functional possibilities of determining clinical efficiency of nitrates in treatment of patients with IHD.

2 ex, 1 tbl

FIELD: medicine.

SUBSTANCE: invention refers in particular to instant diagnosis the CSV of the patient on the basis of the cardiac rhythm variability test. RR intervals (RRI) of the patient are registered and their length is measured. Then the dynamic range of RRI by means of excluding extra systoles which length T3 exceeds double value of the minimum length of RRI 2Tmin and the average length of RRI Tavr in the dynamic range with excluded extra systoles is calculated and changed by the extra systoles on the RRI of length Tavr. Autocorrelation function of the dynamic range RRI is formed and converted to the autocorrelation matrix. The state of the patient's cardiovascular system P is judged by the value of the composite index of the patient's health P, which contains the new index of the regulatory systems tension taking into account maximum and minimum proper values of the autocorrelation matrix and age of the patient in years.

EFFECT: means provides simplification, urgency, advanced objectiveness and accuracy of the diagnosis the cardiovascular system of the patient.

2 cl, 2 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to functional diagnostics. Cardiorhythmographic examination with analysis of heart rhythm is carried out. Vegetative reactivity is determined from the fifth minute of staying in orthoposition, coefficient of adaptation reserve (CAR) is calculated by formula: CAR=TI3/TI2, where TI3 is tension index, calculated by Baevskiy, starting from the fifth minute of staying on orthoposition; TI2 is tension index, calculated by Baevskiy, immediately after transition into orthostasis. By specific values of tension index and CAR and their combination level of vegetative reactivity and state of vegetative adaptation reserve are estimated.

EFFECT: method makes it possible to reduce examination time preserving high result accuracy.

6 tbl, 3 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, in particular, to cardiology, therapy, rehabilitating and preventive medicine. In patients after myocardium infarction, at the background of drug treatment, impact is performed on central and autonomous nerve systems by method of biological feedback. Patient in state of relaxed wakefulness is shown formed on the basis of their cardiorhythmogram periodic curve and their registered cardiorhythmogram. 5 seconds after beginning of active test sound signal is automatically switched on. In each further test on superposing cardiorhythmogram with periodic curve, the latter is corrected in such a way that period varies within 4-12 seconds, heart rate - within 60-75 beats per minute.

EFFECT: method makes it possible in a stable way to recover and/or form cardiorespiratory synchronisation, achieving normal values of heart rate and arterial pressure in treatment of patients after myocardium infarction, with recovery of parasympathetic activity.

3 ex, 7 dwg

FIELD: medicine, cardiology.

SUBSTANCE: one should register rhythmocardiogram, measure current total power in low-frequency and high-frequency areas of dynamic row of cardiointervals. Evaluation of psychophysiological state should be performed by the value of stress index S calculated due to original mathematical formula by taking into account the power of low-frequency and high-frequency constituents of the range of dynamic row of cardiointervals. In case of standard conditions of measurement - the rest lying at one's back position the value of S stress index should be considered to be equal to 1. The method enables to rapidly and noninvasively detect and range human psychophysiological state.

EFFECT: higher accuracy of evaluation.

2 dwg, 1 ex, 2 tbl

FIELD: medicine.

SUBSTANCE: method involves estimating vegetative tonus using cardiointervalography approach and its medication adjustment under cardiointervalography control. The cardiointervalography examination is carried out before applying treatment, in the course of and after the treatment. Each time vegetative tonus increment is estimated on the basis of voltage index. When applying medication adjustment, nootrop group preparations are used that are selected before applying treatment with initial vegetative tonus disorder distinguished by vagotonia or sympathicotonia being taken into account. Preparation or combination of preparations or their doses and application duration is adjusted on basis of vegetative status direction changes obtained from cardiointervalography examination data. The treatment is continued until vegetative status direction change stops towards normotonia.

EFFECT: enhanced effectiveness in selecting individual treatment course.

3 cl, 3 dwg

FIELD: medicine.

SUBSTANCE: method involves recording rhythmocardiogram. Then, spectral analysis of RR intervalogram components in frequency bandwidth from 0.04 to 0.4 Hz is carried out and information value Z is determined from formula Z=Ahf/Alf, where Ahf is the maximum of high frequency component in bandwidth from 0.14 to 0.4 Hz, Alf is the minimum of high frequency component in bandwidth from 0.04 to 0.14 Hz. Z value being greater than 45 and lower than 14, persons consuming narcotic drugs are detected. Z value being lower than 14, persons consuming sedative drugs like opium, morphine, heroine are detected. Z value being greater than 45, persons consuming psychostimulating drugs like cocaine, amphetamine, efedrone, sydnocarb are detected.

EFFECT: high reliability of screening study data.

4 cl, 6 dwg

FIELD: medicine, diagnostics.

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EFFECT: higher accuracy of diagnostics.

3 dwg, 6 ex

FIELD: medicine; cardiology.

SUBSTANCE: electrocardiogram of patients with arterial hypertension is subject to twenty-four-hours monitoring. Spectral analysis of variability of heart beating is conducted and low-frequency, very low frequency and high frequency wave components of heart beating are selected. Strength of wave components of heart beating is determined as general, day and night ones. Generalized factor W is calculated by original relation. Value of W is used for diagnosing absence or presence of hormone-active hyper-plastic process of adrenal glands.

EFFECT: screening testing at out-patient conditions.

2 ex, 2 tbl

FIELD: medicine; cardiology.

SUBSTANCE: electrocardiogram of patients suffering from arterial hypertension is subject to twenty-four-hours monitoring. Spectral analysis of variability of heart beating is carried out. Very low frequency, low frequency and high frequency wave components are selected. General, day and night strength of wave components of heart beating is determined. Any factor is estimated according to the data taken from the spreadsheet. Generalized factor Z is calculated by original mathematical relation. Value of Z is used for judging on level of influence of hormones of adrenal gland onto pace-maker activity of sinus node.

EFFECT: comfort at usage; higher efficiency at non-invasive application.

2 ex, 2 tbl

FIELD: medicine; functional medicine.

SUBSTANCE: method in based upon remote irradiation of human body with set of super wide-band electromagnet pulses with duration of 0,2-1,0 ns, repetition rate of 0,05-30,0 MHZ and average density of flow of energy at irradiated part of human body being equal or less than 0,2 mcW/cm2. Modulation component of pulse repetition rate is selected from received reflected signal which pulse repetition rate is determined by heart activity, which is used for forming heart beat rate signal. The latter is used additionally for estimating index of stress which value of index of stress is included into transmitted communication message of mobile phone.

EFFECT: prolonged monitoring of functional condition of human.

3 cl, 2 dwg

FIELD: medicine, cardiology.

SUBSTANCE: one should register a rhythmocardiogram, detect spectral values for variability of cardiac rhythm, calculate the value of autonomic index, calculate the value of autonomic tonicity by the following formula: AI/lnTp m sq. sec., where AI - autonomic index, lnTp - total power for the spectrum of variability of cardiac rhythm. At values above 3.1 one should diagnose severe flow of autonomic dystonia syndrome, at values being 3.1-2.2 - moderate flow of the mentioned disease, at values ranged 2.1-1.5 - light flow. The method enables to predict the development of hemodynamic disorders.

EFFECT: higher efficiency and accuracy of diagnostics.

3 ex

FIELD: medicine; cardiology.

SUBSTANCE: device for processing intervals of electrocardiogram has plate with Q-T (J-T) and R-R scales applied onto the plate. Plate is additionally provided with legs, rod and scale pointer at the end, arrows, and catches disposed at ends of Q-T (J-T) scale, Q-Tc (J-Tc) correlated values curves and Q-Tc (J-Tc) scale related to them. Rod is divided by axis to parts to relate as 1:5 in such a way that shorter part of rod has to be movable leg and longer part has to be the pointer of Q-T (J-T) scale. Pointer takes "0" position of Q-T (J-) scale to rest against left catch when legs close up. Motionless arrow is disposed onto longer part of rod under pointer of Q-T and/or J-T scale at level of "0" position of R-R scale. Slider with lock is mounted onto pointer to move along pointer. Slider is provided with two arrows. Formulas for building curves of Q-Tc (J-Tc) corrected values are given.

EFFECT: higher speed and comfort at processing of electrocardiograms.

3 cl, 8 dwg, 1 tbl

FIELD: medicine, electrocardiography.

SUBSTANCE: the present innovation deals with measuring parameters of electrocardiosignal (ECS) ST-segment and their analysis to detect deviations against the norm. At every step of quantization one should form the readings of first-order differences and modules of first-order differences. One should memorize N of readings for the modules of first-order differences coming after ECS readings that correspond to the onset of cardiocycle. Then it is necessary to sum up memorized values of modules and at every step of quantization one should compare the obtained current sum value with previous one. It is necessary to memorize the greater of them and according to maximal value one should form threshold level to compare current value of modules sum. Time moments when sum value is at first greater and then lower against threshold level one should consider to be, correspondingly the onset and the end of ST-segment. Time segment between the onset and the end of ST-segment should be considered as duration of ECS ST-signal. Device to isolate ECS ST-signal on-line contains a block for forming ECS, a block for primary ECS processing, a quantization block, a block for isolating the point of cardiocycle onset and measurement of its duration, a block to form first-order differences, a block to form modules of first-order differences, a block to memorize readings for the modules of first-order differences, a block to detect the number of summarized readings for the modules of first-order differences, a summarizing block, a block to form a threshold level, a block for comparison and a key device. The innovation enables to isolate ST-segment more reliably for wider class of electrocardiograms at different modifications of QRS-complex form.

EFFECT: higher efficiency.

2 cl, 12 dwg

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