| Pulmonary function at peak exercise in patients with chronic heart failure. | |
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MedLine Citation:
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PMID: 16893579 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Various respiratory abnormalities are associated with chronic heart failure (CHF). However, changes in inspiratory capacity (IC) and breathing pattern from rest to exercise in patients with CHF have not been thoroughly investigated in these patients. MATERIALS AND METHODS: Seventy seven (66 male/11 female) patients with clinical stable CHF (age: 52+/-11 years) were studied. All the patients underwent pulmonary function tests, including measurements of IC and maximal inspiratory pressure (Pimax) at rest and then a maximal cardiopulmonary exercise testing (CPET) on a treadmill. During the CPET, IC was measured every 2 min. Pimax was measured again after the end of CPET. RESULTS: Percent predicted forced expiratory volume in 1 s (FEV1) was 91+/-12, %predicted forced vital capacity (FVC) was 92+/-13, %FEV1/FVC was 81+/-4, and %predicted IC was 85+/-18. Peak exercise IC was lower than resting (2.4+/-0.6 vs. 2.6+/-0.6 l, p<0.001). Analysis of variance between Weber's groups revealed statistically significant differences in peak exercise IC (p<0.001), VE/VCO2slope (p<0.001), resting Pimax (p=0.005) and post-exercise Pimax (p<0.001). At rest, there was a statistically significant difference in end-tidal CO2 (P(ETCO2)) (p=0.002), in breathing frequency (p=0.004), in inspiratory time (Ti) (p=0.04) and in total respiratory time (T(Tot)) (p=0.004) among Weber's groups. At peak exercise there was a statistically significant decrease in minute ventilation (VE) (p<0.001), tidal volume (VT) (p<0.001), respiratory cycle (VT/TI) (p<0.001) and P(ETCO2) (p<0.001). Peak IC was correlated with peak VO2 (r=0.72, p<0.001), anaerobic threshold (r=0.71, p<0.001), VO2/t slope (r=0.54, p<0.0001), and post-exercise Pimax (r=0.62, p<0.001). CONCLUSIONS: In patients with CHF, peak exercise IC is reduced in parallel with disease severity, which is probably due to respiratory muscle dysfunction. |
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Authors:
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Ourania Papazachou; Maria Anastasiou-Nana; Dimitrios Sakellariou; Antonia Tassiou; Stavros Dimopoulos; John Venetsanakos; George Maroulidis; Stavros Drakos; Charis Roussos; Serafim Nanas |
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Publication Detail:
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Type: Journal Article Date: 2006-08-08 |
Journal Detail:
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Title: International journal of cardiology Volume: 118 ISSN: 1874-1754 ISO Abbreviation: Int. J. Cardiol. Publication Date: 2007 May |
Date Detail:
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Created Date: 2007-04-09 Completed Date: 2007-05-04 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8200291 Medline TA: Int J Cardiol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 28-35 Citation Subset: IM |
Affiliation:
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Pulmonary and Critical Care Medicine Department, Cardiopulmonary Exercise Testing Laboratory and Rehabilitation Center, National and Kapodestrian University of Athens, Evgenidio Hospital, 20, Papadiamantopoulou str, Athens 115 28, Greece. |
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| MeSH Terms | |
Descriptor/Qualifier:
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Anaerobic Threshold Analysis of Variance Chronic Disease Exercise Test* Exercise Tolerance Female Forced Expiratory Volume Heart Failure / physiopathology* Humans Inspiratory Capacity Male Middle Aged Oxygen Consumption / physiology Predictive Value of Tests Respiratory Function Tests Respiratory Mechanics* Vital Capacity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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