Dysfunctional baroreflex regulation of sympathetic nerve activity in remitted patients with panic disorder: A new methodological approach

Toshiki Shioiri, Maki Kojima-Maruyama, Toshihiro Hosoki, Hideaki Kitamura, Akira Tanaka, Makoto Yoshizawa, Takehiko Bando, Toshiyuki Someya

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Background: Many researchers have studied the abnormalities of autonomic nervous system (ANS) such as decreased heart rate variability, which is a risk factor for sudden cardiac death, in patients with panic disorder (PD). However, no consistent abnormality has been uncovered to date. One of the reasons for this controversy may be due to the fact that most of these conventional studies have analyzed each physiological variable independent of other indices. We examined the ANS in PD patients using a new method which can more directly investigate the function of the baroreflex by examining the relation between the blood pressure (BP) and heart rate (HR). Methods: During rest and audiovisual stimulation (AS) as mental stress such as being exposed to video imaginary of experiences such as driving motor vehicles, cardiovascular parameters, HR and BP were consecutively measured in 13 remitted PD patients and twenty aged and gender-matched normal controls (NC). In this study, to assess the cardiovascular ANS function (baroreflex) in PD we used the power spectrum analysis as usual and the mean of lag time (τ) between the Mayer wave components, which was closely related to sympathetic nerve activity of vasomotor, of HR and BP variability as a new trial. Results: The PD patients and NC did not differ with regard to the power spectrum analysis of the heart rate. We found that τ in the PD group was significantly shorter than that in the NC both before and after AS, especially before. Conclusions: These findings suggest that remitted PD patients may have a dysfunctional baroreflex regulation of sympathetic nerve activity.

Original languageEnglish
Pages (from-to)293-298
Number of pages6
JournalEuropean Archives of Psychiatry and Clinical Neuroscience
Volume255
Issue number5
DOIs
Publication statusPublished - 2005 Oct

Keywords

  • Audiovisual stimulation
  • Autonomic function
  • Blood pressure
  • Heart rate
  • Panic disorder
  • Parasympathetic
  • Sympathetic

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry
  • Pharmacology (medical)

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