METHOD FOR ASSESSING THE CONTRACTILITY OF THE LEFT VENTRICULAR MYOCARDIUM Russian patent published in 2022 - IPC A61B8/12 A61B5/318 A61B5/02 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to cardiology. Echocardiographic examination of the heart (ECHO-CG) is performed in B mode, synchronising with an ECG. A four-chamber apical image of the heart is recorded in systole and diastole, the end diastolic (EDV), end systolic (ESV), and stroke (SV) volume of the LV are measured. A line (L) is then drawn from the middle of the mitral valve to the top of the LV, being the long LV axis dividing the LV into two halves; for each half, in systole and diastole, the mirror image thereof is built, followed by dividing the resulting figures. A point (C) is marked in the middle of the line (L). Two lines are drawn from the point of intersection of the lateral edges of the mitral valve with the LV wall to point (C); the resulting section characterises the residual volume. The zone outside of the residual volume is divided into 5 segments equivalent in angle. The total volume of the figure is determined in the four resulting images – two mirrored figures of the diastole and two mirrored figures of the systole, using the disk method; and, dividing the figure in half, as is shown in Fig. 6, a quantitative indicator of the volume of half of the figure in systole or diastole is obtained. The regional contractility of the LV myocardium is then determined. Based on the regional contractility, the total contractility of the LV myocardium is then determined.

EFFECT: possibility of reducing the time of examination and significantly simplifying the calculations, wherein the technique can be applied on any machine for ultrasound diagnostics without the requirement for separate apparatus, sensors, or additional software.

1 cl, 6 dwg, 2 ex