Abstract des Autors

Isometric muscular contraction produces an increase of the total peripheral resistances and of the arterial systemic pressure. In athletes practicing isometric work concentric hypertrophy of the left ventricle is often noticed. In the present work we studied a group of athletes of the Italian weight-lifting team by means of the vectorcardiogram. The control group comprised sedentary subjects of the same age, sex and physical surface. In the weight-lifters we reveal an increase of the Q/R ratio in Z scalar lead and of the anterior and right surface of the horizontal QRS loop. These parameters, indicative of right ventricular hyperthrophy, are within the normal limits. The RX and the R RZ voltages, the RX + RZ value, the Q/R ratio in Z, the QRS frontal loop orientation to the left, the spatial opposition of the T vectors to the QRS ones and the maximum spatial QRS voltage, who are indicative of the left ventricular hypertrophy, are within the normal range in the athletes but statistically different from the control group. Verf.-Referat