The method of determining the state of the tone of the wall of the left atrium

 

(57) Abstract:

The invention relates to medicine, cardiology. Patients spend transesophageal rheography. Allocate a site systole of the left ventricle. Compare the ratio of the duration of the rising part of the wave length of the entire atrial systole. When the value of the analyzed indicator more than 40% concluded the decline in the tone of the wall of the left atrium. If the value of this indicator 20-40% is about preserving the tone of the left atrium. With less than 20% - the increase of the tone. The method allows to identify the role of the left ventricle in diastolic violations in the formation of early signs of heart failure.

The invention relates to medicine, namely to functional diagnostics of the cardiovascular system.

The condition of the heart chambers and the volumes of the cavities at the present time is determined using echocardiography, which accurately specifies the dimensions and calculate the volume indices, including the left atrium. But it cannot determine the tone of the wall of the myocardium, in particular the left atrium, with little muscle mass, the knowledge which is very important in the evaluation of diastolic fu is I tone and contractility of the wall of the left atrium in patients with diseases of the cardiovascular system. The urgency of the invention lies in the special role of fibrillation in the formation of early signs of heart failure, as well as the role, especially the left atrium, diastolic disorders, correction of which is very promising at the initial stages of the disease.

Analogue of the invention the authors suggest that the study of state chambers of the heart using their ultrasonic studies of two-dimensional echocardiography (Schiller N., Osipov, M. A. Clinical echocardiography. M., 1993. - S.). The method allows accurate visualization of the wall of the Atria, but does not reflect the state of her tone. Prototype - evaluation of Central hemodynamics iographica.com way (Pushkar Y. T., Bolshov C. M., Elizarova N. A. and other Determination of cardiac ejection method tetrapolar chest rheography and its metrological capabilities. /Cardiology. 1977.7.85-88. ). Method good estimates cardiac output and systolic myocardial function, but does not allow you to select the systole of the Atria.

The essence of the invention. The invention has as its objective improving the accuracy of diagnosing the state of the myocardium of the left atrium, in particular its tonic properties.

The invention is carried out by pustakalaya at the level of the left atrium under the control of electrogram (the appearance of the ECG pointed, and P wave with maximum amplitude). The distal and proximal poles of the electrode connected to the current-carrying and measuring terminals rheography and register rogramme in tetrapolar version. On rogramme allocate the systole of the Atria, appearing in the form of a pointed peak, recorded immediately before the commencement of the period of exile. Test accuracy is improved by simultaneous registration of rogramme from the esophagus, tetrapolar chest rogramme and one of the ECG leads. On a dedicated site rogramme from the esophagus calculate the duration of the entire period of systole of the Atria and the duration of the ascending part (anakata). These parameters are compared in percentage and with values greater than 40%, conclude decrease tone of the wall of the left atrium. The difference in 20-40% indicates normal tone of the studied Department of infarction. In turn, the divergence of less than 20% corresponds to raise the tone of the myocardium of the left atrium.

For the proposed method are applied reography any modification, and all sorts of registrars (electrocardiographs) having an analog input for switching from peripheral sensors and devices.

Perovich the duration of the ascending part eographically wave systole of the Atria is in the range of 20-40% (28,36,4%). At the same time among the examined patients 64% duration of this part of rogramme exceeded 40%, averaging 63,27,1% (p<0,001). The duration of the analyzed area in the range of 20-40% was present in 17% of patients after myocardial infarction and the remaining 19% of its value was less than 20% (average 18,45,1%; p<0,01). When compared to data from echocardiography observed high correlation of elongation of the rising of the Department of atrial systolic eographically waves more than 40% with dilatation of the cavity of the left auricle, exceeding the diameter in M-mode 4 mm. at the same time these patients when performing transesophageal pacing in 61% of cases were able to provoke paroxysms of atrial fibrillation (when the value of the analyzed parameter 20-40% - 18% of patients, when it is less than 20% - 6%; all p<0,01).

The method of determining the state of the tone of the wall of the left atrium by rheography of the esophagus, characterized in that analyze the duration of the ascending part of the atrial systolic eographically waves in comparison with the entire duration of atrial systole and diagnose reducing the tone of the wall of the left atrium when the discrepancy in excess of 40%, normal tone when the level of 20-40%, and increase the tone level differences less than 20%.

 

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Multi-rheography // 2102003
The invention relates to medical equipment, namely to electronic devices for disease diagnosis and research of the cardiovascular system

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SUBSTANCE: method involves applying ultrasonic Doppler echolocation techniques for scanning blood circulation at selected area of cardiovascular system, determining blood circulation velocity vector projections and calculating blood circulation speed. Echolocation is carried out by using at least three non-complanar probing ultrasonic rays set at angles relative to selected area of cardiovascular system in the range of 0-80°. Selected blood circulation area orientation angles are measured relative to scanning ultrasonic rays and Doppler frequency shifts in each measuring channel are determined. Blood circulation speed is calculated as where ω0i is the radiation frequency of ultrasonic oscillation in ray I, Δωi is the Doppler frequency shifts in measuring channel i, V is the ultrasonic wave propagation speed in the medium, ϑk is the blood circulation speed in selected area, ϑki is the blood circulation velocity projection to scanning ray i, a,b,c,h,k,n11,n12,n13 are the coefficients depending on ultrasonic rays orientation. The device has measuring unit having ultrasonic transducers and electronic unit having switch, high frequency oscillator, calculating unit, indication and control unit. The measuring unit is manufactured as bracelet which segments are connected to each other by means of adjustable hinges and has gages for measuring lateral segment orientation angles relative to the central segment and gages for measuring ultrasonic transducer orientation angles relative to the i-th segment where i = 1,2,3, connected to calculating unit, switch, indication and control unit connected to high frequency oscillator, ultrasonic transducers of the measuring unit are connected via the switch to the high frequency oscillator.

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1 tbl

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3 ex

FIELD: medicine.

SUBSTANCE: method involves evaluating blood microcirculation parameters in urethral mucous membrane before tuberculin test and 48 h thereafter. The microcirculation parameters growing worse by 8-12% and higher, tuberculosis is to be diagnosed. The value remaining unchanged or their values not exceeding 8%, nonspecific urinary tract inflammation is to be diagnosed.

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2 tbl

FIELD: medicine, urology.

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6 tbl, 1 ex

FIELD: medicine.

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6 ex

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2 ex, 4 tbl

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