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      Effects of Respiratory Rate on Heart Rate Variability in Neurologic Outpatients with Epilepsies or Migraine: A Preliminary Study

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          Abstract

          Background

          Variation of spontaneous respiratory rates and influences of spontaneous and paced breathing rates on heart rate variability (HRV) were assessed in patients with epilepsy or migraine, and HRV parameters were compared between the groups.

          Materials and Methods

          Thirty neurologic outpatients, 16 diagnosed with epilepsies and 14 with migraine, were included. Autonomic testing consisted of short-term HRV, the deep breathing test (DBT), and measurement of HRV at systematically changed breathing rates (paced breathing, 5–18 breaths per minute, bpm).

          Results

          Spontaneous respiratory rate during short-term HRV varied from 9 to 23 bpm in the epileptic group and from 5 to 21 bpm in migraine patients and was significantly and negatively correlated with SD of all normal RR intervals (SDNN) and total power (TP) in epileptic patients but not in migraine patients. Paced breathing rate had a significant effect on all HRV parameters assessed in both groups. HRV (SD1, SDNN, TP) and DBT (E-I, SD1, SDNN) parameters were significantly lower in the epileptic group. Group differences were significantly greater during slow compared to fast breathing.

          Conclusions

          An important and new finding is the wide variation of spontaneous respiratory rate in both groups, along with the significant negative correlation with the assessed HRV parameters. The reduction of HRV during slow breathing in epileptic patients may indicate a diminished cardiorespiratory coupling caused by a probable loss of sensitivity within the cardiovagal brainstem circuitry.

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          Author and article information

          Journal
          Med Princ Pract
          Med Princ Pract
          MPP
          Medical Principles and Practice
          S. Karger AG (Allschwilerstrasse 10, P.O. Box · Postfach · Case postale, CH–4009, Basel, Switzerland · Schweiz · Suisse, Phone: +41 61 306 11 11, Fax: +41 61 306 12 34, karger@karger.com )
          1011-7571
          1423-0151
          July 2020
          29 November 2019
          29 November 2019
          : 29
          : 4
          : 318-325
          Affiliations
          aNeurologische Gemeinschaftspraxis, PDDr. Katrin Druschky, PDDr. Achim Druschky, Nürnberg, Germany
          bDepartment of Neurology, University of Erlangen-Nuernberg, Erlangen, Germany
          cFaculty of Life Science, Laboratory of Human Biology and Physiology, Applied Science University, Hamburg, Germany
          Author notes
          *Katrin Druschky, Neurologische Gemeinschaftspraxis, PDDr. Katrin Druschky, PDDr. Achim Druschky, Am Stadtpark 2, DE–90409 Nürnberg (Germany), E-Mail info@ 123456druschky.de ; katrin@ 123456druschky.de
          Article
          PMC7445653 PMC7445653 7445653 mpp-0029-0318
          10.1159/000503710
          7445653
          31698355
          Copyright © 2019 by S. Karger AG, Basel
          Page count
          Figures: 2, Tables: 3, References: 21, Pages: 8
          Categories
          Original Paper

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