ECHOCARDIOGRAPHIC APPROACH FOR THE CLINICAL-ASSESSMENT OF LEFT-VENTRICULAR FUNCTION - ANALYSIS OF END-SYSTOLIC PRESSURE (WALL STRESS) DIAMETER RELATION AND FORCE-VELOCITY RELATION OF EJECTING VENTRICLE

Echocardiography combined with simultaneous measurement of peak systemic pressure was applied for analysis of left ventricular fonction within a two-dimensional framework which took into account the preload, the afterload and the level of myocardial inotropic state. This approach is particulary useful for understanding the behavior of the normal and diseased ventricle under various abnormal loading conditions where a single measurement of ejection characteristics does not necessarily reflect inotropic state. The pressure (or wall stress) - diameter loops were constructed during systolic pressure change and diameter at the end of ejection was linearly related to systolic pressure or systolic wall stress. This relation generally approximates the iso. © 1979, The Japanese Circulation Society. All rights reserved.