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- W1990693905 abstract "<i>Objectives:</i> β-Blockers are standard therapy for patients with heart failure (HF). This study compared the effects of chronic monotherapy with 2 different β<sub>1</sub>-selective adrenoceptor blockers, namely atenolol and metoprolol succinate, on left ventricular (LV) function and remodeling in dogs with coronary microembolization-induced HF [LV ejection fraction (EF) 30–40%]. <i>Methods:</i> Twenty HF dogs were randomized to 3 months of therapy with atenolol (50 mg once daily, n = 6), metoprolol succinate (100 mg, once daily, n = 7) or to no therapy (control, n = 7). LV EF and volumes were measured before initiating therapy and after 3 months of therapy. The change (Δ) in EF and volumes between measurements before and after therapy was calculated and compared among study groups. <i>Results:</i> In controls, EF decreased and end-systolic volume increased. Atenolol prevented the decrease in EF and the increase in ESV. In contrast, metoprolol succinate significantly increased EF and decreased end-systolic volume. ΔEF was significantly higher and Δend-systolic volume significantly lower in metoprolol succinate-treated dogs compared to atenolol-treated dogs (EF: 6.0 ± 0.86% vs. 0.8 ± 0.85%, p < 0.05; end-systolic volume: –4.3 ± 0.81 ml vs. –1 ± 0.52 ml, p <0.05). <i>Conclusions:</i> In HF dogs, chronic therapy with atenolol does not elicit the same LV function and remodeling benefits as those achieved with metoprolol succinate." @default.
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- W1990693905 date "2008-10-02" @default.
- W1990693905 modified "2023-09-25" @default.
- W1990693905 title "Atenolol Is Inferior to Metoprolol in Improving Left Ventricular Function and Preventing Ventricular Remodeling in Dogs with Heart Failure" @default.
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- W1990693905 doi "https://doi.org/10.1159/000159123" @default.
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