[Angiography of the left ventricle: study of the kinetics of the wall. A new theoretical approach].

Authors present a new study of left ventricular local wall motion. A critical study about three methods is analysed. This original analysis method is based on the calculation of local ejection fractions from a mathematical model: a theoretical ideal systolic contour is evaluated from an ejection fraction value and for a left homogeneous ventricular contraction. The left regional wall motion is appreciated from the comparison between real systolic contour and theoretical systolic contour. At first the use problems of classical regional wall motion study are described. This presentation is to develop the mechanical and mathematical particularities of our original method. On the other one the study of computer-derived shape is to allow systematical and quick application to quantify the left ventricle contractility.