This study reports on 22 patients (18 men, 4 women), 45-83-year-old admitted to hospital less than 24 h after the first clinical signs of myocardial infarction. Lipids, lipoproteins, serum insulin and growth hormone, urinary cortisol and vanillylmandelic acid and blood glucose were analysed on the day of admission (day 1) and on days 2, 4 and 8 of the acute phase. Results for lipoproteins generally confirm those of earlier studies: lowered total cholesterol (day 1-8), LDL-cholesterol (day 1-2), HDL-cholesterol (day 2-8), LDL apo B (day 1-2) and apo A-1 (day 1-8). There was no significant correlation between stress hormone and plasma lipoprotein alterations. Blood glucose decreased progressively (P less than 0.05) between day 1 and day 8. Glucose value at day 1 correlated significantly with nonesterified fatty acids, total cholesterol and LDL constituents, but not with HDL-cholesterol and apo A-1. Metabolic disturbances modifying blood glucose thus might be involved in LDL changes, whereas other processes govern HDL changes.
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