Echocardiographic evaluation of acute effects of amiodarone , beta, and calcium blockers on left ventricular function in hypertrophic cardiomyopathy - Sbano, J C N; Medeiros, C C J; Pazolini, M; Moraes, A V; Arteagas Fernandez, E; Barretto, A C P; Cerri, Giovanni Guido; Bellotti, Giovanni; Pileggi, F (Congress Cardiac Doppler Society, 1994)