| Electrical stimulation of acupuncture points and blood pressure responses to postural changes: a pilot study. | |
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MedLine Citation:
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PMID: 21532036 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Background Application of transcutaneous electrical stimulation over acupuncture points (Acu-TENS) facilitates heart rate recovery after exercise and restores hemodynamic stability after open heart surgery. The role of Acu-TENS on cardiovascular parameters in response to postural changes has not been reported. Objective To investigate (1) the effect of Acu-TENS on blood pressure responses to -10º head-down postural change and (2) whether such effects were associated with modulation by the autonomic nervous system. Method Sixteen healthy volunteers, mean age 22.8 (SD, 3.1) years, were subjected to a -10º head-down tilt from the supine position on 3 separate occasions and received in random order the following 3 intervention protocols for 40 minutes before the postural change: Acu-TENS (over bilateral acupuncture points, PC6), sham-TENS (TENS applied to the skin over the patellae), and control (no electrical output from the TENS device applied at PC6). Mean arterial pressure, large artery elasticity index, cardiac output, and heart rate were recorded and compared at different stimulation protocols in the supine and -10º head-down tilt positions. Spectral analysis of heart rate variability was used to determine any modulation by the autonomic nervous system. Results Change in large artery elasticity index was observed only in the Acu-TENS group (P < .05) and mean arterial pressure appeared most stable during Acu-TENS. Autonomic nervous system modulation was not apparent with spectral analysis, irrespective of intervention. Sympathetic activity predominated in all positions. Conclusion Acu-TENS seems to reduce blood pressure changes with -10º head-down tilt with concomitant changes in arterial vessel tone. |
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Authors:
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Alice Y M Jones; Y L Kwan; Nathan T F Leung; Rachel P W Yu; Cindy M Y Wu; Darren E R Warburton |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of critical care : an official publication, American Association of Critical-Care Nurses Volume: 20 ISSN: 1937-710X ISO Abbreviation: Am. J. Crit. Care Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-05-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9211547 Medline TA: Am J Crit Care Country: United States |
Other Details:
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Languages: eng Pagination: e67-74 Citation Subset: IM; N |
Affiliation:
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Alice Y. M. Jones is a professor and Y. L. Kwan, Nathan T. F. Leung, Rachel P. W. Yu, and Cindy M. Y. Wu were physical therapy students at the time of the study in the Department of Rehabilitation Sciences at The Hong Kong Polytechnic University in Hong Kong. Darren E. R. Warburton is an associate professor in the Cardiovascular Physiology and Rehabilitation Laboratory, Experimental Medicine Program, Faculty of Medicine, University of British Columbia, Vancouver, Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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