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Inspiratory muscle training using an incremental endurance test alleviates dyspnea and improves functional status in patients with chronic heart failure.
Eur J Cardiovasc Prev Rehabil. 2004 Dec; 11(6):489-96.EJ

Abstract

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.

Authors+Show Affiliations

Onassis Cardiac Surgery Centre, Athens, Greece. ylaoutaris@yahoo.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15580060

Citation

Laoutaris, Ioannis, et al. "Inspiratory Muscle Training Using an Incremental Endurance Test Alleviates Dyspnea and Improves Functional Status in Patients With Chronic Heart Failure." 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, vol. 11, no. 6, 2004, pp. 489-96.
Laoutaris I, Dritsas A, Brown MD, et al. Inspiratory muscle training using an incremental endurance test alleviates dyspnea and improves functional status in patients with chronic heart failure. Eur J Cardiovasc Prev Rehabil. 2004;11(6):489-96.
Laoutaris, I., Dritsas, A., Brown, M. D., Manginas, A., Alivizatos, P. A., & Cokkinos, D. V. (2004). Inspiratory muscle training using an incremental endurance test alleviates dyspnea and improves functional status in patients with chronic heart failure. 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, 11(6), 489-96.
Laoutaris I, et al. Inspiratory Muscle Training Using an Incremental Endurance Test Alleviates Dyspnea and Improves Functional Status in Patients With Chronic Heart Failure. Eur J Cardiovasc Prev Rehabil. 2004;11(6):489-96. PubMed PMID: 15580060.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Inspiratory muscle training using an incremental endurance test alleviates dyspnea and improves functional status in patients with chronic heart failure. AU - Laoutaris,Ioannis, AU - Dritsas,Athanasios, AU - Brown,Margaret D, AU - Manginas,Athanasios, AU - Alivizatos,Peter A, AU - Cokkinos,Dennis V, PY - 2004/12/8/pubmed PY - 2005/4/29/medline PY - 2004/12/8/entrez SP - 489 EP - 96 JF - 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 JO - Eur J Cardiovasc Prev Rehabil VL - 11 IS - 6 N2 - 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. SN - 1741-8267 UR - https://www.unboundmedicine.com/medline/citation/15580060/Inspiratory_muscle_training_using_an_incremental_endurance_test_alleviates_dyspnea_and_improves_functional_status_in_patients_with_chronic_heart_failure_ L2 - http://ovidsp.ovid.com/ovidweb.cgi?T=JS&amp;PAGE=linkout&amp;SEARCH=15580060.ui DB - PRIME DP - Unbound Medicine ER -