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Contribution of the risk factor concept to patient care in coronary heart disease
Insights
The risk factor concept in preventive cardiology has had a minimal impact on patient care for coronary heart disease. While modifying factors like high blood pressure and smoking is medically sound, their effect on coronary artery disease progression remains unproven.
Area of Science:
- Preventive Cardiology
- Cardiovascular Disease Research
- Medical Practice Evaluation
Background:
- The risk factor concept is central to preventive cardiology for managing coronary heart disease (CHD).
- Key risk factors include plasma cholesterol, hypertension, smoking, diabetes, and obesity.
- These factors, except cholesterol and diabetes, increase myocardial oxygen demand, potentially causing ischemia.
Purpose of the Study:
- To evaluate the contribution of the risk factor concept to patient care in coronary heart disease.
- To assess the demonstrable impact of risk factor modification on CHD outcomes.
Main Methods:
- Review of existing medical literature and clinical practice guidelines.
- Analysis of the relationship between identified risk factors and coronary atherosclerosis.
- Consideration of the complexities of coronary artery pathology and spontaneous regression.
Main Results:
- Modification of risk factors like hypertension and smoking is beneficial general medical practice, independent of CHD.
- Diabetes requires adequate treatment regardless of coronary atherosclerosis presence.
- Demonstrating that lowering plasma cholesterol causes regression of coronary atherosclerosis is not feasible due to disease complexity and spontaneous regression.
Conclusions:
- Risk factor modification is medically advisable but does not demonstrably or predictably affect coronary artery disease.
- The overall contribution of the risk factor concept to patient care in CHD has been trivial.
Abstract:
This article deals with the question of whether or not the risk factor concept, a principal aspect of preventive cardiology, has contributed to patient care in coronary heart disease. The risk factors considered are plasma cholesterol, high blood pressure, smoking, diabetes and marked obesity. With the exception of plasma cholesterol and diabetes, all of these factors enhance myocardial oxygen consumption and thus, in the presence of coronary insufficiency, promote myocardial ischemia. Their modification is therefore good general medical practice, even if not related to coronary atherosclerosis. Diabetes needs adequate medical treatment in patients both with and without coronary atherosclerosis. Because of the occasional occurrence of spontaneous regression of coronary atherosclerosis and the morphologic and functional complexity of coronary artery pathology, it has never been and probably never will be demonstrated that lowering plasma cholesterol levels by diet or other means will cause regression of coronary atherosclerosis. It follows that modification or treatment of risk factors is implemented for good medical reasons but does not demonstrably or predictably affect coronary artery disease. It is concluded that the contribution of the risk factor concept to patient care in coronary heart disease has been, and still is, trivial.
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