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  • Title: Comparison of the effects of carvedilol and nebivolol on diastolic functions of the left ventricle in patients with non-ischemic heart failure.
    Author: Dogan A, Karabacak M, Tayyar S, Erdogan D, Ozaydin M.
    Journal: Cardiol J; 2014; 21(1):76-82. PubMed ID: 23799553.
    Abstract:
    BACKGROUND: We investigated whether carvediolol or nebiovolol with vasodilator properties will produce different effects on diastolic function of the left ventricle (LV) in heart failure (HF) with low ejection fraction (EF). METHODS: Sixty-one non-ischemic HF patients with EF ≤40% randomly received carvedilol (n = 31, 16 male) or nebivolol (n = 30, 19 male). Clinical and echocardiographic evaluations were performed at baseline, 3 and 6 months after therapy. Mitral inflow velocities (E and A waves), deceleration time of E wave (DT), isovolumetric relaxation time (IVRT), mitral annular velocities (Ea and Aa waves) were evaluated. Mitral E/A and E/Ea ratios were calculated. RESULTS: In carvediolol and nebivolol groups, mitral E/A ratio (from 1.08 ± 0.31 to 0.87 ± 0.30 vs. from 0.98 ± 0.20 to 0.80 ± 0.20, p = 0.30) and IVRT (from 108 ± 13 to 94 ± 10 ms vs. from 107 ± 22 to 92 ± 10 ms, p = 0.25) similarly decreased while DT prolonged (from 184 ± 40 to 218 ± 42 ms vs. from 193 ± 37 to 222 ± 36 ms, p = 0.71). Also, E/Ea ratio significantly decreased in each group (p = 0.01), but it was lower in nebivolol group than carvedilol group at 6 months (10.2 ± 2 vs. 11.8 ± 2, p = 0.01). Carvediolol and nebivolol reduced similarly N-terminal pro-B type natriuretic peptide level (from 666 to 137 vs. 661 to 123 pg/dL, p = 0.41, respectively) and improved functional capacity (p > 0.05). CONCLUSIONS: At 6 month follow-up, carvedilol and nebivolol appear to similarly improve LV diastolic functions in non-ischemic HF patients.
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