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• W2111436735 abstract "Background Sildenafil is used for pulmonary hypertension treatment and its use is safe in chronic heart failure (HF) patients. Aims To analyze the effects of sildenafil on lung mechanics, gas diffusion, exhaled nitric oxide (eNO) at rest and during exercise in chronic HF. We did so to evaluate if sildenafil prevents exercise-induced pulmonary edema formation. Methods We studied 22 chronic HF males. We measured after a single dose of placebo, sildenafil (25 mg) and sildenafil (100 mg), lung diffusion (DLCO), molecular diffusion (DM), pulmonary capillary volume (VC), eNO, all at rest and during exercise, standard pulmonary function, and maximal cardiopulmonary exercise. Results At rest sildenafil improved pulmonary mechanics and DLCO from 23.1±6.3 ml/mmHg/min to 23.9±6.4 (25 mg, p<0.05) and to 25.3±6.7 100 mg, p<0.02). Sildenafil (100 mg) prevents edema formation (highest DM/VC during exercise). At rest eNO was low and not affected by tested drugs. With light exercise eNO was higher with sildenafil 100 mg. Peak VO2 increased with sildenafil from 1376±331 ml/min to 1471±375 (25 mg, p<0.01) and 1524±461 (100 mg, p<0.02). Peak VO2 increase was related to DLCO improvement. Conclusion In chronic HF sildenafil increases exercise performance, improves lung mechanics and gas diffusion and prevents exercise-induced pulmonary edema formation probably by restoring NO pathways." @default.
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• W2111436735 date "2008-05-01" @default.
• W2111436735 modified "2023-10-14" @default.
• W2111436735 title "Sildenafil improves the alveolar–capillary function in heart failure patients" @default.
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• W2111436735 doi "https://doi.org/10.1016/j.ijcard.2007.03.118" @default.
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