| Short-term reproducibility of cardiopulmonary measurements during exercise testing in patients with severe chronic heart failure. | |
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MedLine Citation:
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PMID: 9266779 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Eleven men with severe chronic heart failure (peak cardiac index 4.0 +/- 0.2 L/m2/min), six on a heart transplantation waiting list, were prospectively assessed. To determine reproducibility of cardiopulmonary and hemodynamic variables for clinical purposes during ramp bicycle ergometry, the patients underwent two ramp bicycle ergometer tests (3 minutes unloaded, work rate increments of 12.5 W/min) with a 1-week interval between tests. Oxygen uptake (VO2) carbon dioxide production (VCO2), and ventilation were measured breath by breath, and calculations were performed to determine gas exchange ratio, oxygen pulse, ventilatory equivalents of oxygen and carbon dioxide, and end-tidal partial pressure for oxygen and carbon dioxide. Additionally, heart rate, blood pressure, and lactate levels were assessed. Measurements were performed at submaximum work rate levels of 25 W, 50 W, and 75 W at ventilatory threshold and at peak work rate. At all measurement points, the coefficient of variation for cardiopulmonary variables was between 1.4% and 7.1% for submaximum work rate levels, between 1.2% and 4.4% at ventilatory threshold, and between 2.4% and 7.1% at peak work rate. For heart rate, blood pressure, and lactate levels, coefficient of variation was between 2.7% and 5.7% for submaximum work rate levels, between 1.4% and 6.1% at ventilatory threshold, and between 1.2% and 5.5% at peak work rate. The data suggest high reproducibility for duplicate measurements of cardiopulmonary and hemodynamic variables during ramp bicycle ergometry in patients with severe chronic heart failure. The results may be used to determine whether any variable in a single patient is significantly different from that obtained in a previous exercise test or if the change is within experimental error. |
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Authors:
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K Meyer; S Westbrook; M Schwaibold; R Hajric; K Peters; H Roskamm |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American heart journal Volume: 134 ISSN: 0002-8703 ISO Abbreviation: Am. Heart J. Publication Date: 1997 Jul |
Date Detail:
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Created Date: 1997-09-11 Completed Date: 1997-09-11 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0370465 Medline TA: Am Heart J Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 20-6 Citation Subset: AIM; IM |
Affiliation:
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Herz-Zentrum, Bad Krozingen, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Anaerobic Threshold Blood Pressure / physiology Carbon Dioxide / blood, metabolism Cardiac Output / physiology Chronic Disease Ergometry Exercise Test Heart / physiopathology* Heart Failure / physiopathology* Heart Rate / physiology Heart Transplantation Hemodynamics / physiology Humans Lactates / blood Lung / physiopathology* Male Middle Aged Oxygen / blood Oxygen Consumption / physiology Partial Pressure Physical Exertion / physiology* Prospective Studies Pulmonary Gas Exchange / physiology Reproducibility of Results Respiration / physiology Tidal Volume Time Factors Waiting Lists Work |
| Chemical | |
Reg. No./Substance:
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0/Lactates; 124-38-9/Carbon Dioxide; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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