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What does PSP stand for?

PSP stands for peak-systolic pressures


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Aortic valve stenosis is characterized by the left ventricular pressure being much greater than aortic pressure during left ventricular (LV) ejection (see figure at right). In this example, LV peak systolic pressure during ejection is 200 mmHg (normally ~120 mmHg) and the aortic pressure is slightly reduced to from 120 to 110 mmHg. Normally, the pressure gradient across the aortic valve during ejection is very small (a few mmHg); however, the pressure gradient can become quite high during severe stenosis (>100 mmHg).
The maximum cuff pressure at which the pulse can just be heard with the probe is recorded and related to the peak systolic blood pressure.