[Hemorrhagic infarction due to myocardial reperfusion. Report of 4 cases].

Four different clinical cases in which the myocardial reperfusion occurred after acute myocardial infarction, and was followed by significant hemorrhagic ventricular damage. We discuss some possible etiologic mechanism of the problem and present some methods of myocardial protection which are meant to lessen those negative effects of the reperfusion. We conclude setting the difficulty to determine the critical moment after which the myocardial reperfusion turns inefficient or even harmful.