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Modifiable Risk Factors for Incident Heart Failure in the Coronary Artery Surgery Study
Richard M. Hoffman, MD, MPH;
Bruce M. Psaty, MD, MPH;
Richard A. Kronmal, PhD
Arch Intern Med. 1994;154(4):417-423.
Abstract
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Background
Even with aggressive treatment, heart failure is associated with a substantial morbidity and mortality. This poor prognosis has led to increasing interest in primary prevention, and the identification of modifiable risk factors. Our objective was to determine whether modifiable cardiovascular risk factors, including systolic and diastolic blood pressure, fasting glucose level, cholesterol level, weight, and smoking, were independent risk factors for heart failure in patients with anatomically confirmed coronary artery disease.
Methods
We studied all patients with documented coronary artery disease eligible for the multicenter, randomized-controlled Coronary Artery Surgery Study. After excluding 79 prevalent cases, we identified incident cases of heart failure using hospital discharge abstracts, mortality records, or self-reported follow-up questionnaires. Criteria for self-reported cases were treatment with digitalis and/or furosemide plus two or more heart failure symptoms, including dyspnea on exertion, orthopnea, paroxysmal nocturnal dyspnea, or edema. Cox regression analysis was used to estimate adjusted relative risks.
Results
At 12-year follow-up, the cumulative incidence of heart failure was 20.6%. Smoking (relative risk, 1.47) and weight (relative risk, 1.15/10 kg) were independently associated with incident heart failure. Myocardial infarction during follow-up, age, female sex, and baseline left ventricular dysfunction were also risk factors for heart failure.
Conclusions
Patients with stable coronary artery disease are at high risk for developing heart failure, especially following myocardial infarction. However, interventions aimed at smoking cessation and weight reduction may prevent clinical heart failure in these patients.
(Arch Intern Med. 1994;154:417-423)
Author Affiliations
From the Medical Service, Seattle (Wash) Veterans Affairs Medical Center, and the Departments of Medicine, Epidemiology, Health Services, and Biostatistics, University of Washington, Seattle.
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