The increasing number of amateur sportsmen enhances the need for a correct evaluation of subjects suspected of overt and mild cardiac disease. Out of 4000 athletes, 72 subjects were clinically preselected by the sport doctor during an annual routine examination. They were studied with mono and 2D echo, pulsed color (PW) and continuous wave Doppler. Five asymptomatic patients are reported with congenital or acquired valvular diseases.