[Hemodynamic and cartographic study of intravenous trinitrin in the acute stage of myocardial infarct].

12 cases of acute myocardial infarction were prescribed intravenous trinitrin. Haemodynamically, the drug invariably affected the pre-load whether the haemodynamic state was normal (group I), or disturbed by left ventricular failure (group II). Myocardial function was only improved in cases with left ventricular failure. Mapping studies, performed to assess, at least theoretically, the degree of ischaemia, only showed a transient lowering of the ST elevation compared to a control group, and limitation of the ischaemic area around the myocardial necrosis could not be proved.