| Cardiovascular responses and postexercise hypotension after arm cycling exercise in subjects with spinal cord injury. | |
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MedLine Citation:
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PMID: 16876557 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To examine postexercise hypotension and contributing factors in subjects with spinal cord injury (SCI). DESIGN: Prospective clinical research study. SETTING: Rehabilitation center. PARTICIPANTS: Subjects with chronic cervical-level (n=19) and thoracic-level (n=8) SCI. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Subjects underwent graded arm-cycling with electrocardiogram and oxygen uptake monitoring to exhaustion. Heart rates and blood pressures were measured before and after exercising. Injury to motor and sensory pathways was determined by American Spinal Injury Association grade, and to autonomic pathways by sympathetic skin responses (SSRs) (n=16). RESULTS: Resting blood pressures and heart rates were lower in cervical than thoracic SCI (mean arterial pressure [MAP]: cervical, 76.6+/-2 mmHg; thoracic, 93.5+/-3 mmHg; P<.001). Following exercise, heart rate responses were greater in thoracic than cervical SCI; MAP increased in thoracic SCI (8.4+/-5 mmHg) and markedly decreased in cervical SCI (-9.3+/-2 mmHg) (P<.001). No subject had significant electrocardiographic abnormalities at rest or during exercise. There were correlations between SSR and heart rate and blood pressure responses to exercise; the correlation between the SSR and blood pressure response was due to an interaction between the heart rate and blood pressure responses. CONCLUSIONS: Abnormal cardiovascular responses to exercise and transient postexercise hypotension were common in cervical, but not thoracic SCI. This may be partly related to loss of descending sympathetic nervous control of the heart and vasculature following high SCI. |
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Authors:
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Victoria E Claydon; Adrienne T Hol; Janice J Eng; Andrei V Krassioukov |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Archives of physical medicine and rehabilitation Volume: 87 ISSN: 0003-9993 ISO Abbreviation: Arch Phys Med Rehabil Publication Date: 2006 Aug |
Date Detail:
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Created Date: 2006-07-31 Completed Date: 2006-09-12 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2985158R Medline TA: Arch Phys Med Rehabil Country: United States |
Other Details:
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Languages: eng Pagination: 1106-14 Citation Subset: AIM; IM |
Affiliation:
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International Collaboration On Repair Discoveries, University of British Columbia, Vancouver, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Arm / physiopathology* Cervical Vertebrae / injuries Electrocardiography Exercise Test* Female Heart Rate / physiology Humans Hypotension / physiopathology* Male Oxygen Consumption / physiology Prospective Studies Spinal Cord Injuries / physiopathology* Statistics, Nonparametric Thoracic Vertebrae / injuries |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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