In-hospital mortality after acute myocardial infarction.

In order to determine if the risk factors contributing to mortality from acute myocardial infarction (MI) during the period of coronary care unit (CCU) observation are different from those in patients dying in the hospital after CCU discharge, the hospital records of 172 acute MI patients seen over an 18-month period were reviewed. Of the 32 deaths from acute MI, 25 per cent occurred suddenly outside the CCU. The risk factors identified in the 32 deaths were (1) anterior MI (2) Previous MI, (3) cardiac failure, (4) significant ventricular arrhythmia, (5) intraventricular conduction defects, and (6) murmur suggestive of papillary muscle dysfunction. These same risk factors were found to be far more frequent in the patients dying suddenly outside the CCU.