Deck: paused
In S2 splitting, which valve closes first and causes the first sound?  Why?
In S2 splitting, which valve closes first and causes the first sound?  Why?
The aortic valve; the systemic vasculature is less compliant than the pulmonary vasculature and so blood flow "rebounds" faster in the aorta, closing the valve, than in the pulmonary trunk
based on lecture 2