what are the Recommendations for Timing of Intervention of AS
Referenced studies that support the recommendations are
summarized in Online Data Supplements 4 and 6 to 10.?
In apparently asymptomatic patients with severe AS (Stage C1) and low surgical risk, AVR is reasonable when an exercise test demonstrates decreased exercise tolerance (normalized for age and sex) or a fall in systolic blood pressure of ?10 mm Hg from baseline to peak exercise.