Analysis of Pre-CCU Time Interval in Acute Myocardial Infarction.

by M. A. Rockwell, Andrew P. Klaus, J. K. Cooper

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Analysis of the time from onset of symptoms to admission to a Coronary Care Unit (CCU) for 2122 patients with acute myocardial infarction treated in the CCUs of nine hospitals. These data were studied to determine the factors that affect the speed with which patients seek treatment. The median for all patients was 5.8 hours, with a mean of 16.9 hours; 84 percent arrived within 24 hours. Stepwise regression analysis on age, sex, previous medical history, clinical status at the time of admission, and symptom severity was performed for the 1202 patients for whom all the data were recorded. When factors were considered individually, shorter median times occurred with males, young persons, congestive heart failure patients, cases with shock or fainting, and those who considered their symptoms severe. In the stepwise regression, significant variables were shorter intervals for patients with much sweating and longer intervals for angina cases and for one particular hospital. In the aggregate, all the variables together explained only 9 percent of the variance. 14 pp. Ref.

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