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[Effects of molsidomine and nitroglycerin on the regional blood flow in the normal and acutely ischemic myocardium (author's transl)].

In anaesthetized dogs regional myocardial blood flow (radioactive particle distribution technique) and several haemodynamic parameters were measured before and after acute ligation of left descending coronary artery. By injection of N-carboxy-3-morpholino-sydnonimine ethylester (molsidomine, Corvaton) or infusion of nitroglycerin it was tried to influence blood flow of the infarcted areas of the myocardium. 1. Ligation of the coronary artery induces myocardial infarction of anterior wall, predominantly restricted to the endocardial portions of the heart muscle. 2. Molsidomine and also nitroglycerin do not change overall blood flow of the heart in the sense of vasodilation. 3. In the infarcted area the ratio: blood flow of endocardial layers to blood flow of epicardial layers, is improved by molsidomine. 4. The positive effect of molsidomine becomes clearer in the border zone of infarction. Nitroglycerin remains without effect. 5. The effects of the compound molsidomine are explained by stronger action on extravascular factors of colonary vascular resistance (decrease in enddiastolic pressure).