Very early intervention with metoprolol in suspected acute myocardial infarction

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Abstract
A double blind randomized study of 800 patients was carried out to determine if very early intervention with metoprolol (15 mg I. V. followed by oral administration) in suspected acute myocardial infarction affected overall mortality in selected subgroups, (age, site of infarct, delay to intervention). Sudden death occurred less frequently in patients allocated to metoprolol but there was no significant difference in total mortality on discharge, at three months andat twelve months. Ventricular fibrillation after intervention was not significantly reduced. Adverse reactions did not occur significantly more frequently in patients assigned to metoprolol.