Nonparametric Statistics / Survival Analysis / Echocardiography / Humans / Left Ventricular Assist Device / Aortic stenosis / Female / Male / Left Ventricular Dysfunction / Aged / Chi Square Distribution / Exercise Test / Predictive value of tests / Aortic stenosis / Female / Male / Left Ventricular Dysfunction / Aged / Chi Square Distribution / Exercise Test / Predictive value of tests
England / Humans / Female / Male / Young Adult / Left Ventricular Dysfunction / Aged / Middle Aged / Adult / New England Journalof Medicine / Left Ventricular Dysfunction / Aged / Middle Aged / Adult / New England Journalof Medicine