[Myocardial infarction with normal coronary vessels in young subjects. Apropos of 2 cases with an interval of 2 months in 2 brothers aged 32 and 34].

The authors report 2 cases of myocardial infarction with normal coronary arteries occurring at an interval of 2 months in 2 brothers aged 32 and 34. Following an episode of angina, the younger brother, a sportsman, but a smoker, developed an antero-septal infarct at rest, which was complicated by complete persistent right bundle branch block. Ventriculography and coronary angiography were normal. Induced spasm tests were not performed. The elder brother presented an infero-apico-lateral infarct on effort, without any prodromal syndrome, which was complicated by apical akinesia. Ventriculography revealed mitral prolapse. Coronary angiography was normal and the methylergometrine test was negative. In relation to this example of familial infarction with normal coronary vessels, the authors review the features of this type of infarction reported in the literature which predominantly occurs in young people. They discuss the principal points of interest, including the incidence, the criteria of definition based on the coronary angiography, the elements of the prognosis, the pathophysiological mechanisms and the possibility of a genetic predisposition.