IRIS – Institutional Research Information System
IRIS è il sistema di gestione della ricerca dell’Università degli Studi di Milano-Bicocca.Il repository BOA è il modulo del sistema dedicato alla raccolta e alla disseminazione della produzione scientifica di Ateneo. Le pubblicazioni sono ricercabili per parola chiave attraverso il box nella barra orizzontale in alto oppure, mediante il pulsante Sfoglia, per "Afferenza", "Autore", "Titolo", "Tipologia" o "Settore scientifico-disciplinare".
IRIS contiene inoltre alcuni moduli dedicati alla registrazione dei progetti e dei contratti, e alla reportistica avanzata per le attività di valutazione della ricerca
EnglishAims: Exposure to high altitude (HA) hypoxia decreases exercise performance in healthy subjects. Although β-blockers are known to affect exercise capacity in normoxia, no data are available comparing selective and nonselective β-adrenergic blockade on exercise performance in healthy subjects acutely exposed to HA hypoxia. We compared the impact of nebivolol and carvedilol on exercise capacity in healthy subjects acutely exposed to HA hypobaric hypoxia. Methods: In this double-blind, placebo-controlled trial, 27 healthy untrained sea-level (SL) residents (15 males, age 38.3 ± 12.8 years) were randomized to placebo (n = 9), carvedilol 25 mg b.i.d. (n = 9), or nebivolol 5 mg o.d. (n = 9). Primary endpoints were measures of exercise performance evaluated by cardiopulmonary exercise testing at sea level without treatment, and after at least 3 weeks of treatment, both at SL and shortly after arrival at HA (4559 m). Results: HA hypoxia significantly decreased resting and peak oxygen saturation, peak workload, VO2, and heart rate (HR) (P < 0.01). Changes from SL (no treatment) differed among treatments: (1) peak VO2 was better preserved with nebivolol (–22.5%) than with carvedilol (–37.6%) (P < 0.01); (2) peak HR decreased with carvedilol (–43.9 ± 11.9 beats/min) more than with nebivolol (–24.8 ± 13.6 beats/min) (P < 0.05); (3) peak minute ventilation (VE) decreased with carvedilol (–9.3%) and increased with nebivolol (+15.2%) (P = 0.053). Only peak VE changes independently predicted changes in peak VO2 at multivariate analysis (R = 0.62, P < 0.01). Conclusions: Exercise performance is better preserved with nebivolol than with carvedilol under acute exposure to HA hypoxia in healthy subjects.
Valentini, M., Revera, M., Bilo, G., Caldara, G., Savia, G., Styczkiewicz, K., et al. (2011). Effects of beta-blockade on exercise performance at high altitude: a randomized, placebo-controlled trial comparing the efficacy of nebivolol versus carvedilol in healthy subjects. CARDIOVASCULAR THERAPEUTICS [10.1111/j.1755-5922.2011.00261.x].
| Citazione: | Valentini, M., Revera, M., Bilo, G., Caldara, G., Savia, G., Styczkiewicz, K., et al. (2011). Effects of beta-blockade on exercise performance at high altitude: a randomized, placebo-controlled trial comparing the efficacy of nebivolol versus carvedilol in healthy subjects. CARDIOVASCULAR THERAPEUTICS [10.1111/j.1755-5922.2011.00261.x]. | |
| Tipo: | Articolo in rivista - Articolo scientifico | |
| Carattere della pubblicazione: | Scientifica | |
| Presenza di un coautore afferente ad Istituzioni straniere: | Si | |
| Titolo: | Effects of beta-blockade on exercise performance at high altitude: a randomized, placebo-controlled trial comparing the efficacy of nebivolol versus carvedilol in healthy subjects | |
| Autori: | Valentini, M; Revera, M; Bilo, G; Caldara, G; Savia, G; Styczkiewicz, K; Parati, S; Gregorini, F; Faini, A; Branzi, G; Malfatto, G; Magrì, D; Agostoni, P; Parati, G | |
| Autori: | ||
| Data di pubblicazione: | 2011 | |
| Lingua: | English | |
| Rivista: | CARDIOVASCULAR THERAPEUTICS | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1111/j.1755-5922.2011.00261.x | |
| Appare nelle tipologie: | 01 - Articolo su rivista |
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