Evaluation of the autonomic nervous system of the heart in male patients with mitral valve prolapses syndrome using respiratory sinus arrythmia and dynamic exercise - Gallo Junior, L; Morello Filho, J; Maciel, B C; Marin Neto, J A; Martins, L E B; Lima Filho, E C; Terra Filho, João; Almeida Filho, O C; Pintya, A O; Manço, José Carlos (Cardiology, 1989)