| Accelerometer-based quantification of 6-minute walk test performance in patients with chronic heart failure: applicability in telemedicine. | |
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MedLine Citation:
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PMID: 19398082 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Distance walked in the 6-minute walk test (6MWT) is an important prognostic parameter used clinically to assess functional status in patients with chronic heart failure (CHF). In this study, we investigated if alternative performance parameters with similar prognostic value can be gained from accelerometers. METHODS AND RESULTS: Fifty CHF patients (age, 60.9 +/- 14.0 years) were asked to perform a 6MWT while wearing 2 accelerometers and 1 pedometer. Total 6MWT step frequency (SF) and activity counts (VMU) were correlated to 6MWT distance. The accelerometer was highly accurate at quantifying SF (detected vs. observed: r = 0.99; P < .001), whereas the pedometer was unreliable below 50 m/min. VMU increased linearly with walking speed (r = 0.99), and both SF and VMU correlated strongly with 6MWT distance (VMU: r = 0.91; SF: r = 0.87, respectively; P < .001) and each other (r = 0.80, P < .001). CONCLUSIONS: Accelerometers are reliable in measuring physical performance during the 6MWT in CHF patients. Besides the simple acquisition of 6MWT distance currently used for patient assessment, accelerometers provide new data that might be useful to evaluate exercise performance during the 6MWT. This allows for routine assessment of exercise capacity in a home-based setting in the context of telemedicine. |
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Authors:
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Melissa Jehn; Arno Schmidt-Trucks?ess; Tibor Schuster; Henner Hanssen; Michael Weis; Martin Halle; Friedrich Koehler |
Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2009-01-09 |
Journal Detail:
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Title: Journal of cardiac failure Volume: 15 ISSN: 1532-8414 ISO Abbreviation: J. Card. Fail. Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-04-28 Completed Date: 2010-02-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9442138 Medline TA: J Card Fail Country: United States |
Other Details:
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Languages: eng Pagination: 334-40 Citation Subset: IM |
Affiliation:
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Department of Prevention, Rehabilitation and Sports Medicine and Institute for Medical Statistics, Munich, Germany. jehn@sport.med.tum.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Exercise Test / instrumentation*, methods Exercise Tolerance / physiology Female Heart Failure / diagnosis, physiopathology*, therapy* Humans Male Middle Aged Telemedicine / instrumentation*, methods Time Factors Walking / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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