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Ambulatory blood pressure and target organ involvement in hypertension
1Department of Medicine, University of Connecticut School of Medicine, Farmington.
Insights
Casual blood pressure readings may not accurately predict cardiovascular risk. Ambulatory blood pressure monitoring is superior for identifying target organ damage in hypertension, especially for cardiac assessments.
Area of Science:
- Cardiology
- Nephrology
- Neurology
- Hypertension Research
Background:
- Casual blood pressure (BP) is linked to cardiovascular risk, but its predictive accuracy for individual patients with hypertension is debated.
- Controversies exist regarding the ability of standard office BP measurements to predict long-term cardiovascular outcomes.
- Previous studies suggest ambulatory blood pressure monitoring (ABPM) may offer superior risk prediction compared to casual BP.
Purpose of the Study:
- To compare the predictive capacity of casual BP versus 24-hour ABPM for hypertensive target organ involvement.
- To evaluate the utility of ABPM in assessing cardiovascular, renal, and cerebrovascular risk in hypertensive individuals.
- To determine if ABPM is more effective than casual BP in identifying cardiac abnormalities.
Main Methods:
- Prospective, cross-sectional studies were conducted across multiple centers.
- Comparison of predictive accuracy between casual BP and various ABPM parameters (24-hour mean, awake, sleep).
- Assessment of target organ involvement, with a focus on cardiac, renal, and cerebrovascular systems.
Main Results:
- Ambulatory blood pressure consistently demonstrated superiority over casual BP in predicting target organ involvement in hypertension.
- ABPM proved significantly more useful than casual BP for assessing cardiac structure and function abnormalities.
- Data on renal and cerebrovascular disease prediction using ABPM is less extensive than for cardiac outcomes.
Conclusions:
- Ambulatory blood pressure monitoring is a more reliable predictor of target organ damage in hypertension than casual blood pressure.
- ABPM offers greater clinical utility for identifying individuals with hypertension at risk for cardiac complications.
- Further research is needed to fully elucidate the role of ABPM in predicting renal and cerebrovascular disease.
Abstract:
Casual (or office) blood pressure values have been shown to be associated with cardiovascular morbidity or mortality in a variety of prospective trials assessing cardiovascular risk. In recent years, however, controversies have developed regarding the capacity of casual blood pressures to predict cardiovascular risk in an individual patient with high blood pressure. Prospective, cross-sectional studies have been performed in several centres that compare the capacity to predict hypertensive target organ involvement by casual vs 24-h mean, awake, or sleep blood pressures. Ambulatory blood pressure has been consistently superior to casual blood pressure in predicting target organ involvement in hypertension. As most of the data collected to date has involved cardiac studies, however, fewer conclusions can be drawn regarding renal and cerebrovascular disease. With regard to cardiac structure and/or function, ambulatory blood pressure is much more useful than casual blood pressure in determining the likelihood of an abnormal index in an individual patient with hypertension.