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(Circulation. 2002;105:419.)
© 2002 American Heart Association, Inc.

Clinical Investigation and Reports

Traditional Risk Factors and the Incidence of Sudden Coronary Death With and Without Coronary Thrombosis in Blacks

Allen P. Burke, MD; Andrew Farb, MD; Joseph Pestaner, MD; Gray T. Malcom, PhD; Arthur Zieske, MD; Robert Kutys, MS; John Smialek, MD; Renu Virmani, MD

From the Department of Cardiovascular Pathology, Armed Forces Institute of Pathology, Washington, DC (A.P.B., A.F., R.K., R.V.); Louisiana State University Health Science Center, New Orleans (G.T.M., A.Z.); and the University of Maryland, Baltimore (J.P., J.S.).

Correspondence to Renu Virmani, MD, Chairperson, Department of Cardiovascular Pathology, Armed Forces Institute of Pathology, Washington, DC 20306–6000. E-mail virmani{at}afip.osd.mil

Background— Blacks have a high rate of sudden coronary death (SCD). We determined the rate of SCD in men and women 30 to 69 years of age in a 6-year period recorded at a state Medical Examiner’s Office.

Methods and Results— In a subset of 327 whites and 130 blacks, hearts were systematically studied to determine the extent of coronary disease, presence and type of thrombus (acute rupture, acute erosion, stable plaque), and heart weight. These parameters were correlated with the presence of conventional risk factors. The estimated rate of SCD in blacks was similar to that in whites under the age of 40 years but increased compared with whites with advancing age, becoming 1.5 times the rate for whites in the 7th decade (95% of the increase in the 6th decade was due to sudden death with stable plaque). Among the autopsied group with severe coronary atherosclerosis, HDL cholesterol was higher and hypertension more prevalent in blacks, but there was no difference in the prevalence of healed infarcts, plaque burden, heart weight, acute thrombi, or rates of diabetes, cigarette smoking, and total cholesterol.

Conclusions— When compared with a control autopsy group of 568 deaths, multivariate analysis showed a significant association in blacks between stable plaque and left ventricular hypertrophy (risk ratio, 7.6), type 1 diabetes (risk ratio, 3.6), hypertension (risk ratio, 3.5), elevated total cholesterol (risk ratio, 3.1) and type 2 diabetes (risk ratio, 2.9). Because these risk factors are associated with SCD in blacks, they may be important targets for reducing the disparately high rate of SCD in blacks as compared with whites.

Key Words: hypertrophy • risk factors • thrombosis • death, sudden

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