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Ethnic differences in vascular stiffness and relations to hypertensive target organ damage

Nish Chaturvedi1, Christopher J Bulpitt, Sandra Leggetter

  • 1Department of Epidemiology and Public Health, Faculty of Medicine, Imperial College London at St Mary's, Norfolk Place, London, UK. n.chaturvedi@imperial.ac.uk

Journal of Hypertension
|August 18, 2004
PubMed

Insights

African Caribbeans exhibit increased aortic stiffness compared to Europeans, even after accounting for blood pressure differences. This arterial stiffness is linked to interventricular septal thickness but doesn't fully explain ethnic disparities in vascular remodeling.

Area of Science:

  • Cardiovascular Research
  • Vascular Biology
  • Ethnic Health Disparities

Background:

  • Individuals of Black African descent face higher risks of hypertensive target organ damage.
  • Arterial stiffness is a potential factor contributing to ethnic differences in cardiovascular risk.

Purpose of the Study:

  • To investigate ethnic differences in arterial stiffness and its relationship with target organ damage.
  • To compare aortic and peripheral arterial stiffness between Europeans and African Caribbeans.

Main Methods:

  • Cross-sectional, population-based study in London.
  • Involved 103 Europeans and 99 African Caribbeans aged 40-64 years.
  • Measured blood pressure, pulse wave velocity (PWV) of elastic and muscular arteries, and interventricular septal thickness (IVST) via echocardiography.

Main Results:

  • African Caribbeans showed significantly higher carotid-femoral PWV (aortic stiffness) than Europeans, persisting after blood pressure adjustment.
  • Interventricular septal thickness was greater in African Caribbeans, partly explained by aortic stiffness.
  • Stiffness of muscular arteries in the upper limb did not differ by ethnicity but showed differential associations with blood pressure.

Conclusions:

  • Aortic stiffness is elevated in African Caribbeans compared to Europeans, independent of blood pressure.
  • Aortic stiffness is closely related to interventricular septal thickness but explains little of the ethnic difference.
  • Ethnic variations in vascular remodeling may underlie observed differences in arterial stiffness and hypertension response.
Abstract

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