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ORIGINAL ARTICLES

Mild hypercholesterolemia and premature heart disease: do the national criteria underestimate disease risk?

^a Gundersen Lutheran Medical Center, La Crosse, Wisconsin, USA

Manuscript received March 19, 1999; revised manuscript received November 9, 1999, accepted December 29, 1999.

Reprint requests and correspondence: Dr. Kwame O. Akosah, Gundersen Lutheran Medical Center, 1836 South Avenue, La Crosse, Wisconsin 54601
kakosah{at}gundluth.org

OBJECTIVES

To determine the frequency of hospital admissions for acute coronary syndrome in young adults and to examine the risk factors that predispose to the development of premature heart disease.

BACKGROUND

Significant coronary heart disease (CHD) is considered rare in the young adult. Current guidelines do not recommend treatment of mild cholesterol abnormalities for primary prevention of CHD in the young.

METHODS

This is a large case series of 449 adults (50 years) admitted to the hospital with acute coronary syndrome. A history of cardiovascular risk factors and lipid profile were recorded. The presence and extent of CHD were established.

RESULTS

Mean patient age was 44 ± 6 years. Documented CHD was present in 61% of hospital admissions. Multivariate analysis revealed that history of hypercholesterolemia, history of smoking and diabetes were independently associated with premature CHD. The fasting lipid profiles were only borderline to mildly abnormal. Serum total cholesterol, low-density lipoprotein (LDL) and triglyceride levels were not different in cases compared with control subjects. Nearly half (49%) of those with LDL levels of 160 mg/dl had only one additional risk factor or none. Despite this, a history of hypercholesterolemia had independent and incremental value on other risk factors for the likelihood of premature CHD.

CONCLUSIONS

The magnitude of hospital admissions relating to premature CHD is high. In this population, the presence of borderline or mild hypercholesterolemia has significant effects on the development of premature CHD. These observations have significant implications in the development of guidelines for primary prevention of premature CHD.

Abbreviations and Acronyms   CHD = coronary heart disease   HDL = high-density lipoprotein   LDL = low-density lipoprotein   MI = myocardial infarction   NCEP = National Cholesterol Education Program   RR = relative risk

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