Relationship Between the Ratio of Acceleration Time/Ejection Time and Mortality in Patients With High-Gradient Severe Aortic Stenosis. - Altes A; Thellier N; Bohbot Y; Ringle Griguer A; Verdun S; Levy F; Castel AL; Delelis F; Mailliet A; Tribouilloy C; Maréchaux S (Journal of the American Heart Association, 2021)