echocardiography: ventricular septal wall ratio to posterior wall greater than 1.3
echocardiography: ventricular septal wall ratio to posterior wall greater than 1.3
echocardiography: ventricular septal wall ratio to posterior wall greater than 1.3 (procedure)
echocardiography: ventricular septal wall ratio to posterior wall greater than 1.3 (procedure)