Severity of Coronary Sclerosis in the Aged

Abstract
The incidence of myocardial infarction was elevated in those with high stenotic indices (sum of the coronary stenosis of the 3 vessels). There were 594 cases (61.4%) of balanced stenosis, 238 cases (24.6%) of unbalanced stenosis and 136 cases (14.0%) of rare type (extreme difference of degree of stenosis between the 3 vessels). There were 155 cases (16.0%) of 3 vessel disease, 154 cases (15.9%) of 2 vessel disease, 215 cases (22.2%) of 1 vessel disease and 444 cases (45.9%) of no significant coronary sclerosis. The incidence of myocardial infarction in these 4 groups was 47.1, 22.1, 9.3 and 2.3%, respectively. The left anterior descending artery was the leading artery in 1 and 2 vessel diseases, followed by the right coronary artery and then the left circumflex coronary artery.

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