Numerical method for calculating the segments' work of the left ventricle

Background. Estimation of the work of each segment of the left ventricle (LV) characterizes the effectiveness of myocardial contraction and the actual cardiac output of the LV. The aim of this study is to develop and justify new indicators based on longitudinal, radial and circular deformations obtained using 3D speckles echocardiography.
Materials and methods. Segmented data was obtained using an ultrasound machine «$Vivid^{TM} E95$» in 2D- and 3D-modes. To calculate the operation of individual LV segments, a numerical method is implemented.
Results. In this paper, studied the relationship between the deformation characteristics of the left ventricle and its volumetric indices. The obtained performance indicators can more accurately reflect LV systolic function. Conclusion. The proposed indicators of the effectiveness of the LV provide a more accurate assessment of the state of the myocardium. The mathematical apparatus opens up unique opportunities for further study of the contractile function of the myocardium.