Vagal withdrawal as a function of audience

R. De Meersman, S. Reisman, M. Daum, R. Zorowitz

Research output: Contribution to journalArticle

Abstract

This investigation examined the effects of psychosocial influences upon vagal cardiac activity. In this crossover, counterbalanced study, 15 subjects were assesssed for vagal cardiac activity before and during a presentation in the presence and/or absence of an audience. Electrocardiograms (ECG) were collected throughout the epochs of interest, using a portable holter monitor system. Power spectral density analyses were used to decompose autonomic rhythmicities of heart rate variability. Significantly diminished vagal power was noted before and during presentation episodes with an audience compared with vagal power during a presentation without an audience (P <0.05). Because respiration modulates autonomic outflow, ECG-derived respiration was derived and compared for all epochs, and no significant differences were noted. The real-life findings in the current investigation are strongly suggestive of the modulating effects of psychosocial interactions upon vagal cardiac electrophysiology and should be considered when assessing autonomic status.

Original languageEnglish (US)
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Volume270
Issue number4 39-4
StatePublished - 1996
Externally publishedYes

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Electrocardiography
Respiration
Cardiac Electrophysiology
Periodicity
Heart Rate

Keywords

  • power spectral analysis
  • presentation
  • vagal tone

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

De Meersman, R., Reisman, S., Daum, M., & Zorowitz, R. (1996). Vagal withdrawal as a function of audience. American Journal of Physiology - Heart and Circulatory Physiology, 270(4 39-4).

Vagal withdrawal as a function of audience. / De Meersman, R.; Reisman, S.; Daum, M.; Zorowitz, R.

In: American Journal of Physiology - Heart and Circulatory Physiology, Vol. 270, No. 4 39-4, 1996.

Research output: Contribution to journalArticle

De Meersman, R, Reisman, S, Daum, M & Zorowitz, R 1996, 'Vagal withdrawal as a function of audience', American Journal of Physiology - Heart and Circulatory Physiology, vol. 270, no. 4 39-4.
De Meersman, R. ; Reisman, S. ; Daum, M. ; Zorowitz, R. / Vagal withdrawal as a function of audience. In: American Journal of Physiology - Heart and Circulatory Physiology. 1996 ; Vol. 270, No. 4 39-4.
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