[Ergometric evaluation of patients with WPW syndrome (author's transl)].

20 subjects affected by ventricular pre-excitation, without any other associated cardiac disorder, underwent to maximal exercise test on bicycle ergometer; the aim of the research is to analyse their maximum levels of aerobic power, to study their electrocardiographic behaviour during exercise, with a particular reference to the ventricular repolarization, and finally to evaluate the incidence of arrhythmias during exercise. The maximum aerobic power was slightly lower than the reference standards (on average 78.32%); the muscular work, in 1 patient only, gave rise to cardiac arrhythmias during exercise. In these patients we assume as non specific, the "like ischemic" variations of the ventricular repolarisation during exercise.