| Inspiratory muscle training using an incremental endurance test alleviates dyspnea and improves functional status in patients with chronic heart failure. | |
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MedLine Citation:
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PMID: 15580060 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The benefits of inspiratory muscle training (IMT) in patients with chronic heart failure (CHF) have been inadequately studied. DESIGN AND METHODS: Using a prospective, age and sex-matched controlled study, we investigated 35 patients with moderate to severe CHF (NYHA class II-III and left ventricular ejection fraction 24.4+/-1.3% [mean+/-SEM]). An incremental respiratory endurance test using a fixed respiratory workload was provided by software with an electronic mouth pressure manometer interfaced with a computer. The training group (n=20) exercised at 60% of individual sustained maximal inspiratory pressure (SMIP) and the control group (n=15) at 15% of SMIP. All patients exercised three times weekly for 10 weeks. Pulmonary function, exercise capacity, dyspnea and quality of life were assessed, pre- and post-training. RESULTS: The training group significantly increased both maximum inspiratory pressure (Pimax), (111+/-6.8 versus 83+/-5.7 cmH2O, P<0.001), and SMIP (527822+/-51358 versus 367360+/-41111 cmH2O/sec x 10(-1), P<0.001). Peak VO2 increased after training (17.8+/-1.2 versus 15.4+/-0.9 ml/kg/min, P<0.005), as did the six-minute walking distance (433+/-16 versus 367+/-22 meters, P<0.001). Perceived dyspnea assessed using the Borg scale was reduced for both the treadmill (12.7+/-0.57 versus 14.2+/-0.48, P<0.005) and the walking (9+/-0.48 versus 10.5+/-0.67, P<0.005) exercise tests and the quality of life score was also improved (21.1+/-3.5 versus 25.2+/-4, P<0.01). Resting heart rate was significantly reduced with training (77+/-3.3 versus 80+/-3 beats/min, P<0.05). The control group significantly increased Pimax (86.6+/-6.3 versus 78.4+/-6.9 cmH2O, P<0.05), but decreased SMIP (274972+/-32399 versus 204661+/-37184 cmH2O/sec x 10(1), P<0.005). No other significant effect on exercise capacity, heart rate, dyspnea, or quality of life was observed in this group. CONCLUSION: Inspiratory muscle training using an incremental endurance test, successfully increases both inspiratory strength and endurance, alleviates dyspnea and improves functional status in CHF. |
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Authors:
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Ioannis Laoutaris; Athanasios Dritsas; Margaret D Brown; Athanasios Manginas; Peter A Alivizatos; Dennis V Cokkinos |
Publication Detail:
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Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: European journal of cardiovascular prevention and rehabilitation : official journal of the European Society of Cardiology, Working Groups on Epidemiology & Prevention and Cardiac Rehabilitation and Exercise Physiology Volume: 11 ISSN: 1741-8267 ISO Abbreviation: Eur J Cardiovasc Prev Rehabil Publication Date: 2004 Dec |
Date Detail:
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Created Date: 2004-12-06 Completed Date: 2005-04-28 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 101192000 Medline TA: Eur J Cardiovasc Prev Rehabil Country: England |
Other Details:
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Languages: eng Pagination: 489-96 Citation Subset: IM |
Affiliation:
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Onassis Cardiac Surgery Centre, Athens, Greece. ylaoutaris@yahoo.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Breathing Exercises* Dyspnea / physiopathology, rehabilitation* Exercise Test* Female Forced Expiratory Volume / physiology Heart Failure / physiopathology, rehabilitation* Heart Rate / physiology Humans Inspiratory Capacity / physiology Male Manometry Middle Aged Oxygen Consumption / physiology Physical Endurance / physiology* Prospective Studies Quality of Life Respiratory Muscles / physiopathology Stroke Volume / physiology Treatment Outcome Ventricular Dysfunction, Left / physiopathology, rehabilitation Vital Capacity / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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