Index to Chiropractic Literature
Index to Chiropractic Literature
My ICL     Sign In
Wednesday, October 5, 2022
Index to Chiropractic LiteratureIndex to Chiropractic LiteratureIndex to Chiropractic Literature

For best results switch to Advanced Search.
Article Detail
Return to Search Results
ID 20561
  Title Heart rate variability modulation after manipulation in pain-free patients vs patients in pain
Journal J Manipulative Physiol Ther. 2009 May;32(4):277-286
Peer Review Yes
Publication Type Article
Abstract/Notes BACKGROUND: The purpose of this study was to examine heart rate variability (HRV) in the presence or the absence of pain in the lower back, while receiving one chiropractic treatment at L5 from either a manually assisted mechanical force (Activator) or a traditional diversified technique spinal manipulation.

METHODS: A total of 51 participants were randomly assigned to a control (n = 11), 2 treatment, or 2 sham groups (n = 10 per group). Participants underwent an 8-minute acclimatizing period. The HRV tachygram (RR interval) data were recorded directly into a Suunto watch (model T6; FitzWright Company Ltd, Langley, British Columbia, Canada). We analyzed the 5-minute pretreatment and posttreatment intervals. The spectral analysis of the tachygram was performed with Kubios software.

RESULTS: All groups decreased in value except the control group that reacted in the opposite direction, when comparing the pretests and posttests for the high-frequency component. The very low frequency increased in all groups except the control group. The low frequency decreased in all groups except the sham pain-free group. The low frequency-high frequency ratio decreased in the treatment pain group by 0.46 and in the sham pain-free group by 0.26. The low frequency-high frequency ratio increase was 0.13 for the sham pain group, 0.04 for the control group, and 0.34 for the treatment pain-free group. The mean RR increased by 11.89 milliseconds in the sham pain-free group, 18.65 milliseconds in the treatment pain group, and 13.14 milliseconds in the control group. The mean RR decreased in the treatment pain-free group by 1.75 milliseconds and by 0.01 milliseconds in the sham pain group.

CONCLUSION: Adjusting the lumbar vertebrae affected the lumbar parasympathetic nervous system output for this group of participants. Adaptation in the parasympathetic output, reflected by changes in high frequency, low frequency, and very low frequency, may be independent of type of adjustment. Therefore, the group differences found in the modulation of the HRV would seem to be related to the presence or absence of pain. The autonomic nervous system response may be specific and sensitive to its effectors organ.

This abstract is reproduced with the permission of the publisher. Click on the above link for the PubMed record for this article; full text by subscription.

   Text (Citation) Tagged (Export) Excel
Email To
HTML Text     Excel

To use this feature you must register a personal account in My ICL. Registration is free! In My ICL you can save your ICL searches in My Searches, and you can save search results in My Collections. Be sure to use the Held Citations feature to collect citations from an entire search session. Read more search tips.

Sign Into Existing My ICL Account    |    Register A New My ICL Account
Search Tips
  • Enclose phrases in "quotation marks".  Examples: "low back pain", "evidence-based"
  • Retrieve all forms of a word with an asterisk*, also called a wildcard or truncation.  Example: chiropract* retrieves chiropractic, chiropractor, chiropractors
  • Register an account in My ICL to save search histories (My Searches) and collections of records (My Collections)
Advanced Search Tips