Cardiovascular rhythms in vasovagal syncope

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Vasovagal syncope is a disorder of regulation in which different quantities of neural sympathetic and vagal activities interact, resulting in an unstable autonomic profile before the loss of consciousness. The functional state of the cardiovascular autonomic control is mirrored by the amplitude (power) of the spontaneous fluctuations in RR interval and blood pressure variability and in the pattern of the discharge activity of the post-ganglionic sympathetic fibers (muscle sympathetic nerve activity, MSNA). Power-spectrum and cross-spectrum analysis methodologies enable the identification of the frequency and the quantification of the amplitude of these fluctuations, giving a valuable insight into the autonomic changes preceding vasovagal events which may remain hidden when simple heart rate or blood pressure values are considered.

Original languageEnglish
Title of host publicationVasovagal Syncope
PublisherSpringer International Publishing
Pages83-93
Number of pages11
ISBN (Print)9783319091020, 9783319091013
DOIs
Publication statusPublished - Jan 1 2015

Keywords

  • Autonomic Nervous System
  • Cardiovascular Rhythms
  • Heart Rate Variability
  • Muscle Sympathetic Nerve Activity
  • Power Spectrum Analysis
  • Tilt Test
  • Vasovagal Syncope

ASJC Scopus subject areas

  • Medicine(all)

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