Elderly and old patients with subacute myocardial infarction showed elevated gastrointestinal digoxin absorption rates and a tendency to increased bioavailability of the drug, as compared to similar parameters in infarction-free patients of the same age, so that blood digoxin peaks were higher in the former. The demonstrated absorption changes may be related to limited physical activity of the myocardial infarction patients examined. Digoxin pharmacokinetic patterns are analysed with reference to baseline myocardial contractility.
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