Table 2: Baseline Echocardiography and Progression Rate of Aortic Stenosis. Continuous variables are expressed as median (IQR) and categorical variables are expressed as N (%). Progression rate was calculated by dividing the difference in mean gradient or peak velocity between first and last echocardiograms by time elapsed between scans. Patients were determined to be rapid progressors if annualized progression of mean gradient was greater than the average of that for the entire study cohort.
AS: aortic stenosis, AVA: aortic valve area