Selective training of respiratory muscles in patients with chronic heart failure

Citation
A. Martinez et al., Selective training of respiratory muscles in patients with chronic heart failure, REV MED CHI, 129(2), 2001, pp. 133-139
Citations number
24
Language
SPAGNOLO
art.tipo
Article
Categorie Soggetti
General & Internal Medicine
Journal title
REVISTA MEDICA DE CHILE
ISSN journal
0034-9887 → ACNP
Volume
129
Issue
2
Year of publication
2001
Pages
133 - 139
Database
ISI
SICI code
0034-9887(200102)129:2<133:STORMI>2.0.ZU;2-Q
Abstract
Background: Patients with chronic heart failure have a lower inspiratory mu scle strength and fatigue endurance. Aim: To assess the effects of selectiv e training of respiratory muscles in patients with heart failure. Patients and methods: Twenty patients with stable chronic heart failure, aged 58.3+/ -3 years with an ejection fraction of 28+/-9%, were subjected to respirator y muscle training with threshold valves. The load was fixed in 30% of maxim al inspiratory pressure (PImax) in 11 and in 10% of PImax in nine. Two sess ions of 15 minutes, 6 days per week, during 6 weeks were done. Degree of dy spnea (Mabler score), maximal oxygen uptake, distance walked in 6 minutes, respiratory muscle function and left ventricular ejection fraction were mea sured before and after training. Results: Both training loads were associat ed to an improvement in dyspnea (+2.7+/-1.8 and +2.8+/-1.8 score points wit h 30% PImax and 10% PImax respectively), maximal oxygen uptake (from 19+/-3 to 21.6+/-5 and from 16+/-5 to 18.6+/-7 ml/kg/min with 30% PImax and 10% P Imax respectively, p<0.05, PImax (from 78+/-22 to 99+/-22 and from 72+/-34 to 82.3 cm H2O with 30% PImax and 10% PImax respectively), sustained PImax (from 63+/-18 to 90+/-22 and from 58+/-3 to 69+/-3 cm H2) with 30% PImax an d 10% PImax respectively), and maximal sustained load (from 120+/-67 to 195 +/-47 and from 139+/-120 to 192+/-154 g with 30% PImax and 10% PImax respec tively). The distance walked in 6 min only increased in subjects trained at 30% PImax (from 451+/-78 to 486+/-68 m). Conclusions: Selective training o f respiratory muscles results in a functional improvement of patients with chronic heart failure.