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Figure 1 Simultaneous left ventricular (LV) pressure signals obtained by Millar micromanometers in the LV cavity and the LVOT. Also shown is LVOT outflow velocity and an electronically derived LV pressure difference signal. Dotted arrows point to the timing of peak LV-LVOT pressure-gradient development. Solid arrows point to the timing of peak LV outflow velocity. See text for discussion.
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