why during insp. pul valve closes later thn AV - got2study2pass

[ArchivalUser]

please explain why durning ispiration in a normal heart the pulm valve closes even later than the aortic valve...during inspiration it occurs even later...why

[ArchivalUser]

S2 heart sound = beginning of Diastole = pulmonic and aortic close (variation with respiration “ as diaphragm goes down they
increase the intrathoracic pressure. Blood is being sucked into the right side of the heart, and the pulmonic valve will close later
than the aortic valve. So, the second heart sound has a variation with inspiration “ the P2 separates away from A2 b/c more blood
coming into the right heart, so the valve closes a little bit later.(goljan pathology)