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- W1895783375 abstract "Background: Inspiratory capacity (IC) reduction indicates exercise dynamic hyperinflation (DH) in COPD patients, since inspiratory muscle pressure did not change during IC maneuvers. A proportion of patients with pulmonary hypertension (PH) exhibit IC decrement with exercise, suggesting DH. However, respiratory muscle strength is reduced in these patients, which could affect IC measurements. Aims: Evaluate the behavior of respiratory muscle pressures and IC after exercise in PH. Methods: Incremental cardiopulmonary exercise testing with serial measurements of IC was performed. Mouth occlusion maximal inspiratory (PImax) and expiratory (PEmax) pressures were measured before and after peak exercise. Results: We evaluated 20 patients (15 with arterial PH and 5 with chronic thromboembolic PH; 85% females). They were 47.1±13.7 yrs old, presenting a mean pulmonary arterial pressure and pulmonary vascular resistance by right heart catheterization of 49.9±17.3mmHg and 7.8±5.2 Woods, respectively. PImax was 64.7±23.5 before and 61.9±23.7 cmH2O after exercise (p=0.20). Otherwise, PEmax decreased significantly after exercise (94.8±29.9 vs 80.6±25,4cmH2O; p Conclusions: PImax did not significantly decrease after exercise and was not related to IC reduction. This data support a real DH in PH patients that show reduction in IC." @default.
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- W1895783375 date "2014-09-01" @default.
- W1895783375 modified "2023-09-27" @default.
- W1895783375 title "Changes in inspiratory capacity and respiratory muscle strength after maximal exercise in pulmonary hypertension" @default.
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