青森地域における急性心筋梗塞の冠危険因子および関連事項についての検討

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  • Coronary risk factors and related characteristics in acute myocardial infarction in the Aomori area.

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Coronary risk factors and related characteristics of acute myocardial infarction (AMI) were studied in patients with AMI (fitst time occurrence) in the Aomori area where the mortality from ischemic heart disease and stroke were higher than in the rest of Japan.<BR>Subjects were 512 patients (364 male and 148 female) with AMI, aged 21 to 89 years old who were admitted to Aomori prefectural central hospital between April 1981 and March 1994.<BR>Items surveyed included 1. sex, 2. type of angina pectoris prior to AMI, 3. number of patients with AMI per year, 4. circadian variation in the frequency of AMI onset, 5. variation in the frequency of AMI onset during a year, 6. how soon the patients entered the hospital after the onset of AMI, 7. activity conditions at the onset of AMI, 8. coronary risk factors : a) smoking, b) hypertension, c) aortic arch calcification in chest X-P, d) diabetes mellitus, e) hyper-cholesterolemia, f) obesity, g) hyperuricemia, h) renal function disorder, i) family history, j) cerebro-vascular disease, k) total number of coronary risk factors in patients with AMI in each hemodynamic subset of Forrester's classification.<BR>Results should that two specific factors related to AMI exist in AMI in the Aomori area, Japan : 1. onset of AMI was concentrated in the winter season (cold stress), 2. ratio of presence of hypertension was higher than in rest Japan. It appears that counter-measures directed at the two factors may decrease mortality from ischemic heart disease in the Aomori area.

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