in early systole , before the effects of reflected waves from the periphery become significant , the following equation applies : pa - po = rho cu ( 1 ) where pa and po are the instantaneous and end-diastolic pressures in the ascending aorta , rho the density of blood , c the velocity of the pulse wave in the aorta , and u the velocity of blood .
C0003956
ascending
C0003483
aorta