[Arrhythmogenic right ventricular dysplasia. Case report and review of the literature].

Two cases of arrhythmogenic right ventricular dysplasia are described. The most important clinical features of the disease are malignant ventricular arrhythmia and sudden death. It is characterized by the loss of right ventricular musculature and by the fatty and connective tissue infiltration of the right ventricular wall.

Effects of coronary occlusion and norepinephrine on the myocardium of alloxan-diabetic dogs.

The aim of this study was to clarify the role of altered diabetic vascular reactivity in ischaemic heart disease. In diabetic condition, the necrotic area of myocardial infarction was significantly extended and myocardial oedema failed to develop after administration of norepinephrine 2 or 48 hours after ligation of the left anterior descending coronary artery. In metabolically healthy dogs the necrotic area of myocardial infarction was considerably smaller and an increase in myocardial water content, in myocardial thiocyanate space, in microscopically demonstrable permeability and in diastolic stiffness of left ventricular wall occurred when norepinephrine was administered 2 or 48 hours after coronary infarction.