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Original Article
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Volume 340:1162-1168 April 15, 1999 Number 15
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Temporal Trends in Cardiogenic Shock Complicating Acute Myocardial Infarction
Robert J. Goldberg, Ph.D., Navid A. Samad, M.B., B.S., M.P.H., Jorge Yarzebski, M.D., M.P.H., Jerry Gurwitz, M.D., Carol Bigelow, Ph.D., and Joel M. Gore, M.D.

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ABSTRACT

Background Limited information is available on trends in the incidence of and mortality due to cardiogenic shock complicating acute myocardial infarction. We studied the incidence of cardiogenic shock complicating acute myocardial infarction and in-hospital death rates among patients with this condition in a single community from 1975 through 1997.

Methods We conducted an observational study of 9076 residents of metropolitan Worcester, Massachusetts, who were hospitalized with confirmed acute myocardial infarction in all local hospitals during 11 one-year periods between 1975 and 1997. Our study included periods before and after the advent of reperfusion therapy.

Results The incidence of cardiogenic shock remained relatively stable over time, averaging 7.1 percent among patients with acute myocardial infarction. The results of a multivariable regression analysis indicated that the patients hospitalized during recent study years were not at a substantially lower risk for shock than patients hospitalized in the mid-to-late 1970s. Patients in whom cardiogenic shock developed had a significantly greater risk of dying during hospitalization (71.7 percent) than those who did not have cardiogenic shock (12.0 percent, P<0.001). A significant trend toward an increase in in-hospital survival among patients with cardiogenic shock in the mid-to-late 1990s was found in crude and adjusted analyses.

Conclusions Our findings indicate no significant change in the incidence of cardiogenic shock complicating acute myocardial infarction over a 23-year period. However, the short-term survival rate has increased in recent years at the same time as the use of coronary reperfusion strategies has increased.


Source Information

From the Department of Medicine, University of Massachusetts Medical School, Worcester (R.J.G., J.Y., J.G., J.M.G.); and the Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts, Amherst (N.A.S., C.B.).

Address reprint requests to Dr. Goldberg at the Department of Medicine, Division of Cardiovascular Medicine, University of Massachusetts Medical School, 55 Lake Ave. N., Worcester, MA 01655, or at robert.goldberg{at}ummc.ummed.edu.

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