Fetal cardiac arrythmias as a signal of cardiac malformation: an echocardiographic study - Medeiros, C C J; Martins, T C; Wagenfuhr, J; Moyses, R M A; Abensur, H.; Avila, W S; Grinberg, M; Cerri, Giovanni Guido; Bellotti, Giovanni; Pileggi, F (Congress Cardiac Doppler Society, 1994)