Click on image to view larger version.

Figure 2 Simultaneous LV and aortic pressure signals obtained by Millar micromanometers in the LV and proximal aorta, just above the aortic valve during rest, exercise and isoproterenol infusion. Also shown is aortic flow velocity and an electronically derived LV-AO "impulse gradient" (IG) signal. Arrow definitions as in Figure 1. See text for discussion.