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Baroreflex sensitivity and heredity in essential hypertension.

R J Parmer1, J H Cervenka, R A Stone

  • 1Department of Medicine, University of California, San Diego.

Circulation
|February 1, 1992
PubMed
Summary

Family history significantly impacts baroreflex sensitivity, a key heart rate regulator. This suggests genetic factors contribute to essential hypertension development.

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Published on: February 14, 2021

Area of Science:

  • Cardiovascular Physiology
  • Hypertension Research
  • Autonomic Nervous System Function

Background:

  • Baroreflex control of heart rate is crucial for blood pressure regulation.
  • Abnormalities in baroreflex function are implicated in the development of essential hypertension.

Purpose of the Study:

  • To investigate the influence of heredity on baroreflex sensitivity.
  • To determine if a family history of hypertension affects baroreflex function.

Main Methods:

  • Measured baroreflex sensitivity in untreated essential hypertensive patients and normotensive controls.
  • Grouped participants based on the presence (FH+) or absence (FH-) of a family history of hypertension.
  • Utilized both high-pressure (phenylephrine) and low-pressure (amyl nitrite) stimuli to assess baroreflex sensitivity.

Main Results:

  • Baroreflex sensitivity was significantly lower in individuals with a family history of hypertension, regardless of blood pressure status.
  • Both normotensive and hypertensive individuals with a family history showed impaired baroreflex sensitivity compared to those without.
  • Family history of hypertension emerged as the strongest unique predictor of reduced baroreflex sensitivity after controlling for covariates.

Conclusions:

  • Impairment in baroreflex sensitivity in hypertension is partly genetically determined.
  • A hereditary component, indicated by family history, plays a significant role in the pathogenesis of essential hypertension.