Figure 6From: Pre-ejection period by radial artery tonometry supplements echo doppler findings during biventricular pacemaker optimization Effect of Biventricular Pacemaker Optimization on PEP measured by Radial Artery Tonometry and Echo Doppler. Effect of biventricular pacemaker optimization on PEP/VTI (left panel) and on PEP/ET (right panel) measured by radial artery tonometry (PEP) and by echo Doppler (VTI and ET) are shown in each study subject. PEP, pre-ejection period; VTI, velocity time integral; ET, ejection timeBack to article page