Effect of age on adrenergic and vagal baroreflex sensitivity in normal subjects

Chih Cheng Huang, Paola Sandroni, David M. Sletten, Stephen D. Weigand, Phillip A. Low

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

The baroreflex maintains a stable blood pressure (BP) by dynamically adjusting heart rate (vagal component) and total peripheral resistance (adrenergic component). Vagal baroreflex sensitivity (BRS-v) is widely used but no methodology existed to quantitate adrenergic baroreflex sensitivity (BRS-a) until we developed the indices of BP recovery time (PRT) and BRS-a. The aims of this study were to generate a normative database and to evaluate whether there is an age effect on the cardiovagal and adrenergic sensitivities. We evaluated recordings of heart rate (HR) and BP in 255 normal subjects during the Valsalva maneuver (VIvI) and determined both BRS-v and BRS-a sensitivities. PRT increased with age whereas all other parameters declined with age. The adrenergic parameters correlated well with each other but not significantly with BRS-v. The results indicate that both BRS-a and BRS-v become blunted with increasing age and that these indices behave independently of each other.

Original languageEnglish (US)
Pages (from-to)637-642
Number of pages6
JournalMuscle and Nerve
Volume36
Issue number5
DOIs
StatePublished - Nov 1 2007

Keywords

  • Adrenergic
  • Age
  • Baroreflex sensitivity
  • Cardiovagal
  • Valsalva maneuver

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)

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