Copyright © 1994 by the European Society of Cardiology.
© 1994 The European Society of Cardiology
Declining hospital mortality in acute myocardial infarction
Department of Medicine, University of Göteborg Östra Hospital, Sweden
Received 17 February 1993; revised 4 August 1993; .
Correspondence: Mikael Dellborg MD, Department of Medicine, Östra Hospital, University of Göteborg, 41685 Göteborg, Sweden
Abstract
Beta-blockers, nitrates, aspirin and thrombolytic drugs have each separately been shown to reduce mortality in acute myocardial infarction, but the effect of these treatments combined during routine coronary care has not been assessed. The coronary care unit at Östra Hospital services a stable community of 250 000 inhabitants. Since 1984 all patients have been entered into a computerized database. In addition, information on age, sex, discharge diagnosis and hospital outcome is also available for patients admitted between 1979 and 1983. In 1984, routine treatment with intravenous beta-blockers was introduced, to be followed in 1986 by intravenous nitroglycerin and in 1988 by aspirin in all patients without contraindications. Since 1988, intravenous thrombolytic treatment has been also given routinely to all patients with ST-elevation and chest pain <6 h. Despite a similar number of patients and an increasing median age, the in-hospital mortality has declined from 18·5% in 1979 to 11·8% in 1990 (P<0·01). It is concluded that mortality from acute myocardial infarction has declined by almost 40% since 1979. This reduction cannot be explained by a single major therapeutic intervention but may be attributed to the combined use of multi-lead monitoring, early use of beta-blockers, nitroglycerin, aspirin and thrombolytic agents.
Key Words: Myocardial infarction • mortality • thrombolysis • nitroglycerin • beta-blockers
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