[Contractile function of the myocardium and central hemodynamics in acute myocardial infarct patients after a single intravenous injection of adrenergic beta receptor blockaders].

Cardiac hemodynamics and myocardial contractility were examined in patients with acute myocardial infarction during urgent aorto-coronary shunting with and without beta-adrenergic blockers. The beta-blockers were shown to have a protective effect, as reflected in a smaller myocardial strain owing to a decrease in heart rate, stroke and cardiac outputs, and pulmonary arterial blood pressure. Propranolol proved the most effective agent, whereas visken produced the smallest effect.