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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/216251
β3 adrenergic agonist treatment in chronic pulmonary hypertension associated with heart failure (SPHERE-HF): a double blind, placebo-controlled, randomized clinical trial.
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Aims: Pulmonary hypertension (PH) associated with left heart disease is an increasingly prevalent problem, orphan of targeted therapies, and related to a poor prognosis, particularly when pre- and post-capillary PH combine. The current study aimed to determine whether treatment with the selective β3 adrenoreceptor agonist mirabegron improves outcomes in patients with combined pre- and post-capillary PH (CpcPH).
Methods and results: The β3 Adrenergic Agonist Treatment in Chronic Pulmonary Hypertension Secondary to Heart Failure (SPHERE-HF) trial is a multicentre, randomized, parallel, placebo-controlled clinical trial that enrolled stable patients with CpcPH associated with symptomatic heart failure. A total of 80 patients were assigned to receive mirabegron (50 mg daily, titrated till 200 mg daily, n = 39) or placebo (n = 41) for 16 weeks. Of them, 66 patients successfully completed the study protocol and were valid for the main analysis. The primary endpoint was the change in pulmonary vascular resistance (PVR) on right heart catheterization. Secondary outcomes included the change in right ventricular (RV) ejection fraction by cardiac magnetic resonance or computed tomography, other haemodynamic variables, functional class, and quality of life. The trial was negative for the primary outcome (placebo-corrected mean difference of 0.62 Wood units, 95% confidence interval [CI] -0.38, 1.61, p = 0.218). Patients receiving mirabegron presented a significant improvement in RV ejection fraction as compared to placebo (placebo-corrected mean difference of 3.0%, 95% CI 0.4, 5.7%, p = 0.026), without significant differences in other pre-specified secondary outcomes.
Conclusions: SPHERE-HF is the first clinical trial to assess the potential benefit of β3 adrenergic agonists in PH. The trial was negative since mirabegron did not reduce PVR, the primary endpoint, in patients with CpcPH. On pre-specified secondary outcomes, a significant improvement in RV ejection fraction assessed by advanced cardiac imaging was found, without differences in functional class or quality of life.
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MIRABET, Sonia, GARCÍA ÁLVAREZ, Ana, BLANCO VICH, Isabel, GARCÍA LUNAR, Isabel, JORDÀ BURGOS, Paloma, RODRIGUEZ ARIAS, Juan j., FERNÁNDEZ FRIERA, Leticia, ZEGRÍ, Isabel, NUCHE, Jorge, GÓMEZ BUENO, Manuel, PRAT GONZÁLEZ, Susanna, PUJADAS, Sandra, SOLÉ GONZÁLEZ, Eduard, GARCÍA COSÍO, María dolores, RIVAS LASARTE, Mercedes, TORRECILLA, Estefanía, PEREDA, Daniel, SÁNCHEZ, Javier, GARCÍA PAVÍA, Pablo, SEGOVIA CUBERO, Javier, DELGADO JIMÉNEZ, Juan, FUSTER, Valentín, BARBERÀ I MIR, Joan albert, IBÁÑEZ CABEZA, Borja, SPHERE-HF Investigators.. β3 adrenergic agonist treatment in chronic pulmonary hypertension associated with heart failure (SPHERE-HF): a double blind, placebo-controlled, randomized clinical trial.. _European Journal of Heart Failure_. 2023. Vol. 25, núm. 3, pàgs. 373-385. [consulta: 20 de gener de 2026]. ISSN: 1388-9842. [Disponible a: https://hdl.handle.net/2445/216251]