[Dilatation of the coronary arteries and coronary heart disease in middle and old age].

The study of the main coronary arteries dilatation of 500 patients who died from different forms of coronary heart disease in the advanced and senile age is performed. Combined coronarographic and WHO standard anatomical method as well as a back-sight morphometrical analysis were used. It is established that the dilatations of main coronary arteries are of a focal-segmentary type with a decreasing frequency of a segmental damage in a distal direction. The anterior interventricular branch of the left coronary artery is most liable to dilatation. Close correlation between the main coronary arteries dilatation and myocardial infarction in aged and senile persons are revealed.