Cardiology Flashcards | Quizlet
In
individuals with normal aortic valves, the valve area is 3-4 cm2. As
aortic stenosis develops (AS), a minimal transvalvular pressure gradient
is present until the orifice area falls by more than 50%. Severe AS
defined as a valve area < 1cm2 , usually accompanied by a mean
transvalvular gradient > 40 mmHg.