title: [Myocardial infarct before the age of 36: 20 cases].
abstract: Twenty cases of myocardial infarction in 16 males and 4 females and less than 36 are reported. The number of heavy smokers was greater than in other age groups (86%), and an association between tobacco consumption and lipid abnormalities was found in 3/4 of cases. All the females were on contraceptive treatment, one recurring during pregnancy. The clinical features of the infarctions were an onset which was usually unexpected (n=14), ar attack which was sometimes precipitated by exercise (n=3), and the infrequency of residual angina. The exercise test (n=16) showed up an associated abnormality in only one case out of four, but the fact that the rate-pressure product was normal suggests that the coronary artery networks were in a satisfactory state of function. Ventriculography (n=14) was normal in 35% of cases. Coronary arteriography (n=18) showed significant lesions in 12 cases, one trunk being affected in 6, two trunks in 5, and 3 trunks in one; the lesion index was 1.6. In 6 cases there were few changes in the coronary arteries, and the probable mechanism of the infarct is discussed: besides the possibility of a recanalised thrombus, which appears to be the likely one in two of our patients, spasm played a possible role even though the ergonovine provocation test was negative. The mortality during the first month was zero; as a secondary event over a follow-up period of 38 months, there were two deaths and four recurrences, one of which occurred in a healthy coronary vascular tree.
mesh_terms: D000328:Adult; D000367:Age Factors; D003276:Contraceptives, Oral / Q000009:adverse effects; D017023:Coronary Angiography; D005080:Exercise Test; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D008055:Lipids / Q000097:blood; D008297:Male; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000209:etiology; D012907:Smoking / Q000150:complications
chemical_list: D003276:Contraceptives, Oral; D008055:Lipids
vernacular_title: L'infarctus du myocarde avant 36 ans. A propos de 20 cas.