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Kaplan-Meier curves showing the probability of symptom-free survival according to the rate of heart rate rise during exercise testing in (A) for the whole study population, and in (B) for the subset of patients who did not develop revealed symptoms on the baseline exercise test and (C) shows event-free survival from all-cause mortality in patients with moderate aortic stenosis and (D) shows event-free survival from aortic valve replacement in patients with severe aortic stenosis.
