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Reactivity as a predictor of subsequent blood pressure: racial differences in the Coronary Artery Risk Development in

Sarah S Knox1, Jeff Hausdorff, Jerome H Markovitz

  • 1Division of Epidemiology and Clinical Applications, National Heart, Lung, and Blood Institute, Bethesda, Md 20892, USA. knoxs@nhlbi.nih.gov

Hypertension (Dallas, Tex. : 1979)
|December 7, 2002
PubMed

Insights

Cardiovascular stress reactivity predicts future blood pressure increases, particularly in Black individuals. This heightened response to stress may explain higher hypertension rates in Black populations.

Area of Science:

  • Cardiovascular Physiology
  • Hypertension Research
  • Racial Health Disparities

Background:

  • Black individuals exhibit higher blood pressure and heart rates compared to White individuals.
  • Men generally have higher blood pressure than women, while women have higher heart rates than men.
  • Understanding cardiovascular reactivity's role in blood pressure development is crucial for public health.

Purpose of the Study:

  • To investigate the association between cardiovascular reactivity and subsequent ambulatory blood pressure.
  • To explore potential racial and gender differences in this association.
  • To identify stress reactivity as a potential risk factor for hypertension in Black populations.

Main Methods:

  • The Coronary Artery Risk Development in Young Adults (CARDIA) Study cohort (n=316) was used.
  • Cardiovascular reactivity was measured in subjects aged 20-33 years.
  • Ambulatory blood pressure and heart rate were measured 3 years later, with regression analyses performed.

Main Results:

  • Systolic blood pressure reactivity to stress was significantly associated with later systolic ambulatory pressure in Black men and women.
  • Heart rate reactivity predicted subsequent ambulatory heart rate in Black individuals.
  • Diastolic reactivity showed significant associations with ambulatory blood pressure in Black women and White men.

Conclusions:

  • Cardiovascular hyperresponsivity to stress may be a risk factor for elevated blood pressure in Black individuals.
  • This pathway could contribute to the higher prevalence of hypertension among Black populations.
  • Findings highlight the importance of stress management in cardiovascular health, especially in at-risk groups.

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