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- W2417135086 abstract "Objective To investigate the clinical efficacy of cardiac resynchronization therapy (CRT) through biventricular pacing in chronically right ventricular apical paced patients with heart failure. Methods Ten chronically right ventricular apical paced patients with left ventricular ejection fraction (EF)≤35% underwent CRT upgrading. And the follow-up period was over 12 months. Seven of them reported a significant improvement in their symptoms. Two patients died and one patient had no response. As compared with pre-CRT, CRT significantly improved NYHA classification, decreased left atrium diameter [(43 ±5) mm vs (46 ±7) mm], pulmonary arterial pressure [(42 ±6) mm Hg vs (54 ±13 ) nnn Hg] and BNP [( 184 ± 73 ) ng/L vs ( 545 ± 286 ) ng/L] ( P ＜ 0. 05 ), improved left ventricular EF [(35 ± 5 ) % vs ( 32 ± 4 ) %]. Tissue Doppler imaging revealed the maximal difference of time to peak myocardial systolic contraction of 12 left ventricular segment shortened [(136 ± 28) ms vs (97 ± 18 )ms],interventricular mechanical delay shortened [(52 ± 5 ) ms vs (31 ± 6 ) ms)] after upgrading. Conclusion CRT upgrading from right ventricular apical pacing may improve left ventricular function in patients with heart failure.Key words: Cardiac pacing artificial; Heart failure, congestive" @default.
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- W2417135086 date "2011-04-12" @default.
- W2417135086 modified "2023-09-23" @default.
- W2417135086 title "Upgrading to resynchronization therapy in patients with heart failure after chronic right ventricular apical pacing" @default.
- W2417135086 doi "https://doi.org/10.3760/cma.j.issn.0376-2491.2011.14.013" @default.
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