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Prehypertension and risk of cardiovascular disease
Kayalar Atilla1, Ramachandran S Vasan
1Metro West Medical Center Framimngham, Framingham, MA 01702, USA. akayalar@massnmed.org
Insights
Blood pressure has a continuous link to vascular risk, with no safe lower limit. The Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC VII) defined prehypertension to address this risk.
Area of Science:
- Cardiology
- Public Health
- Epidemiology
Background:
- Epidemiologic data reveal a continuous relationship between vascular risk and blood pressure, extending to 115/75 mmHg.
- A critical threshold for 'high' blood pressure is absent, indicating risk at lower levels.
Purpose of the Study:
- To introduce and define the category 'prehypertension' based on blood pressure levels between 120-139/80-89 mmHg.
- To highlight the significant prevalence and cardiovascular disease risk within the prehypertensive population.
Main Methods:
- Utilizing data from the Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC VII).
- Estimating global cardiovascular risk using standardized risk prediction algorithms for prehypertensive individuals.
Main Results:
- Prehypertension affects an estimated 31% of the US population (70 million individuals).
- Cardiovascular disease risk in prehypertensive individuals is not uniform and increases with other vascular risk factors.
Conclusions:
- A strategy of estimating global cardiovascular risk and adjusting treatment intensity based on absolute risk is recommended for prehypertension.
- Adopting a healthier lifestyle is a critical therapeutic component for managing prehypertension as per JNC VII guidelines.
Abstract:
Epidemiologic data have established a continuous relationship between vascular risk and blood pressure that extends down to levels as low as 115/75 mmHg, emphasizing the lack of a critical threshold value that defines 'high' blood pressure. Acknowledging the graded and continuous nature of the relations of blood pressure to vascular risk, the Seventh Report of the Joint National Committee on the Prevention, Detection, Evaluation and Treatment of High Blood Pressure (JNC VII) introduced the new category 'prehypertension' to describe people with a systolic blood pressure between 120 and 139 mmHg and/or a diastolic blood pressure between 80 and 89 mmHg. It is estimated that 31% of the US population (70 million) has prehypertension. The risk of cardiovascular disease within this large prehypertensive population is not uniform, however, and increases with a rising concomitant burden of other vascular risk factors. Accordingly, a strategy of estimating global cardiovascular risk (by applying standardized risk prediction algorithms) and adjusting the intensity of blood pressure lowering (and reduction of other risk factors) to the absolute risk of cardiovascular disease is desirable in prehypertensive individuals. Adopting a healthier lifestyle, as recommended by JNC VII, is a critical component of the therapeutic approach to prehypertension.
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