[Adaptation of the normal and ischemic heart to muscular exertion].

The response of the cardiovascular system to muscular exertion whether dynamic or static, depends on several factors, such as sex, age, position, level of training, etc. If some physiological responses of the heart are well known, others remain debatable, especially the behavior of the telediastolic volume of the left ventricle. The ejection fraction of this ventricle is increased, essentially by improvement of the myocardial contractility. In ischemic cardiopathies, the behavior of the hemodynamic variables is more disputed than in the normal patient, and of course, depends before all on the area of the ischemic zone: the total performance of the heart depends on the interactions between zones which are little or not contractile and normal zones. Physical training could, in addition to its peripheral action have an action on the myocardial function on coronary patients.