MR TOMOGRAPHIC FUNCTIONAL-ANALYSIS OF THE LEFT-VENTRICLE

The following contribution presents a continuous MRT analysis of the c ontraction and relaxation processes of healthy left ventricles giving reference values for contraction and relaxation velocities. For the to tal ventricle we have V(syst.r.total) = 342 +/- 47% LVEDV/sec and V(di ast.r.total) = 303 +/- 59% LVEDV/sec. In relation to the end-diastolic (tomographic) volume (EDSV) significantly greater changes in volume p er unit of time were measured apically compared to basal (systolic: 41 1 +/- 89% EDSV/sec apical vs 261 +/- 35% EDSV/sec basal; diastolic: 81 0 +/- 145% EDSV/sec apical vs 245 +/-70% EDSV/sec basal). Occurrence o f the end-systolic minimal volumes of apical tomographic layers was de layed against the total ventricle by 22.4 +/- 7.9% t syst. Within the ventricle there was systolically a redistribution of the proportions o f volume from apical to basal.