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Influence of multiple risk factors on the hazard of hypertension
1Boston University School of Medicine, Evans Memorial Department of Clinical Research, University Hospital at Boston University Medical Center, Massachusetts, USA.
Insights
High blood pressure significantly increases the risk of atherosclerosis and coronary artery disease (CAD). Managing hypertension effectively requires assessing multiple risk factors beyond just blood pressure levels for optimal cardiovascular health.
Area of Science:
- Cardiology
- Hypertension Research
- Preventive Medicine
Background:
- Hypertension is a primary driver of atherosclerosis and coronary artery disease (CAD).
- Cardiovascular risk escalates with the degree of blood pressure elevation, irrespective of age or sex.
- Isolated systolic hypertension also contributes significantly to cardiovascular risk.
Purpose of the Study:
- To investigate the multifaceted risk factors associated with hypertension and their impact on cardiovascular disease.
- To emphasize the importance of a comprehensive risk profile in managing hypertensive patients.
- To highlight that optimal hypertension management involves more than just blood pressure normalization.
Main Methods:
- Analysis of clinical data linking blood pressure levels to cardiovascular events.
- Evaluation of associated risk factors such as lipid abnormalities, hyperglycemia, and obesity.
- Assessment of organ involvement (proteinuria, ventricular dysfunction, hypertrophy) as indicators of risk.
Main Results:
- Elevated blood pressure is frequently accompanied by other risk factors (lipids, glucose, obesity, ECG changes) that amplify cardiovascular risk.
- The overall cardiovascular risk profile, rather than blood pressure alone, dictates the potential for CAD.
- Associated risk factors significantly influence the risk of stroke, peripheral vascular disease, and cardiac failure in hypertensive individuals.
Conclusions:
- Hypertensive risk assessment must integrate a multivariate risk profile due to interconnected risk factors.
- Treatment decisions for hypertension should be guided by the comprehensive risk profile, not solely by blood pressure readings.
- Preventive management of hypertension necessitates addressing all contributing risk factors to avoid coronary sequelae.
Abstract:
Atherosclerosis and coronary artery disease (CAD) are now the commonest sequelae of hypertension and all clinical manifestations of CAD occur in excess in persons with elevated blood pressure. Risk increases in relation to the extent of blood pressure elevation whether this is in the systolic or diastolic component, at any age and in either sex. Even isolated systolic hypertension increases cardiovascular risk. Elevated pressures are often accompanied by lipid abnormalities, hyperglycemia, elevated fibrinogen, obesity, and ECG abnormalities, all of which augment the risk. These risk factors associated with hypertension influence the coronary risk potential more than the nature of the blood pressure elevation. Although blood pressure makes an independent contribution to CAD, the risk at any level of pressure is markedly influenced by the cardiovascular risk profile. In mild to moderate hypertension in particular, the risk of CHD is concentrated in those who have impaired glucose tolerance, increased total/HDL ratio, ECG abnormalities, and smoke cigarettes. One or more of these associated risk factors also predisposes to other cardiovascular sequelae of hypertension, including stroke, peripheral vascular disease, and cardiac failure. The presence of organ involvement indicated by proteinuria, evidence of impaired ventricular function, or left ventricular hypertrophy greatly escalates the risk and usually indicates a compromised coronary circulation. Most myocardial infarctions and sudden deaths occur prior to the appearance of such evidence. Hypertensive risk assessment requires consideration of the multivariate risk profile because of the interdependence of the risk factors. The nature and urgency of treatment is better determined from such a risk profile than from the blood pressure parameters alone. Optimal preventive management of hypertension requires more than normalization of the blood pressure if coronary sequelae are to be avoided.