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Hypertension as a risk factor for cardiac events--epidemiologic results of long-term studies
1Department of Medicine, Evans Memorial Research Foundation, Boston University School of Medicine, Massachusetts.
Insights
Hypertension significantly increases cardiovascular disease risk, particularly coronary heart disease. Other risk factors like high cholesterol and diabetes amplify hypertension's impact, underscoring the need for comprehensive management.
Area of Science:
- Cardiology
- Public Health
- Internal Medicine
Background:
- Hypertension is a primary driver of cardiovascular disease (CVD), increasing risk threefold compared to normotensive individuals.
- Elevated blood pressure accelerates atherosclerosis, leading to premature coronary heart disease (CHD) as its most frequent complication.
Purpose of the Study:
- To elucidate the independent and synergistic effects of hypertension and coexisting risk factors on cardiovascular morbidity and mortality.
- To identify specific risk profiles associated with hypertensive coronary disease and stroke.
Main Methods:
- The study analyzes the impact of elevated blood pressure on cardiovascular disease incidence and mortality.
- It examines the association between hypertension and other atherogenic risk factors such as hyperlipidemia, hyperglycemia, and obesity.
- Risk factors for hypertensive stroke, including left ventricular hypertrophy and atrial fibrillation, are assessed.
Main Results:
- The effect of hypertension on CVD and CHD is independent of other risk factors but significantly amplified by them.
- Commonly associated factors include hyperlipidemia, hyperglycemia, obesity, elevated fibrinogen, and ECG abnormalities.
- Hypertensive individuals with increased LDL/HDL ratio, impaired glucose tolerance, or smoking habits face greater risks.
Conclusions:
- Hypertension is a critical precursor to cardiovascular disease, especially in the elderly, where absolute risk remains high despite diminishing relative risk ratios.
- Coexisting risk factors significantly influence the impact of hypertension, often exerting a greater effect than blood pressure elevation alone.
- Managing hypertension alongside other modifiable risk factors is crucial for preventing cardiovascular events.
Abstract:
Hypertension is a major contributor to cardiovascular disease, which imparts a threefold increased risk over that of normotensive persons the same age. It accelerates atherogenesis-promoting premature coronary disease, now its most common sequela. The effect of elevated blood pressure on cardiovascular disease morbidity and mortality in general and on coronary disease incidence in particular is independent of the influence of other predisposing atherogenic cofactors but is greatly affected by them. Elevated blood pressure is more often than usual associated with hyperlipidemia, hyperglycemia, hyperuricemia, excessive weight, elevated fibrinogen, and electrocardiogram (ECG) abnormalities, which enhance its impact. Hypertensive coronary candidates usually have an increased low-density lipoprotein/high-density lipoprotein (LDL/HDL) cholesterol ratio, impaired glucose tolerance. ECG abnormalities, or a cigarette smoking habit. These coexisting risk factors exert a greater influence than the character of the blood pressure elevation. Those at risk for hypertensive stroke have left ventricular hypertrophy (LVH), atrial fibrillation, cardiac failure, coronary disease, diabetes, or a cigarette habit. Cardiovascular risk ratios for hypertension diminish with advancing age, but this is offset by a higher absolute risk, making hypertension an important precursor of cardiovascular disease in the elderly.