Experimental evaluation of left ventricular (LV) function during left heart bypass(LHB) by pulsed Doppler flowmetry (PDF) of left ventricle

Abstract

Transmitral flow dynamics was studied with PDF to evaluate LV diastolic properties non-invasively without cessation of LHB in dogs. Transmitral peak velocities of diastolic rapid inflow (R), atrial contraction (A), mean acceleration (AC) and deceleration (DC) of R, and A/R were obtained. R, AC and DC during LHB had a correlation to (+) max dP/dt during off-LHB ana A/R had a correlation to (+) and (-)max dP/dt during off-LHB. In conclusion, diastolic indeces by PDF during LHB are considered to reflect LV function during off-LHB.