<prompt> Pulse pressure in severe aoic regurgitation is equal to-30-45mmHg45-60mmHg60-75 mmHg75-90 mm Hg  <response>: Therefore, a defining characteristic of aoic regurgitation is an increase in aoic pulse pressure systolic minus diastolic pressure. ... Early in the course of regurgitant aoic valve disease, there is a large increase in left ventricular end-diastolic pressure and left atrial pressure.pulse pressure usually between 75-90 mmhg Ref Davidson 23rd edition pg 450 