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- W4327717846 abstract "Background To investigate the relationship between the Q wave in synthesized V7–9 leads of a baseline electrocardiogram and clinical outcomes in patients with heart failure after cardiac resynchronization therapy (CRT) device implantation. Methods Consecutive patients with heart failure and a left ventricular (LV) ejection fraction <35 % were retrospectively analyzed. Patients with Q waves in the synthesized V7–9 lead were defined as the qV7–9 group and those without Q waves in the synthesized V7–9 lead were defined as the non-qV7–9 group. Multivariate analysis was performed to compare all-cause mortality and incidence of hospitalization for heart failure between the two groups. Results We included 108 eligible patients. Twenty-nine patients were classified into the qV7–9 group and 79 patients were classified into the non-qV7–9 group. There were 22 patients (20 %) with ischemic etiology, 67 (62 %) with New York Heart Association functional class II or III heart failure, and 91 (84 %) with a defibrillator. The presence of Q waves in the synthesized V7–9 lead was significantly associated with worse outcomes, even with optimal medical treatment (adjusted hazard ratio, 2.1; 95 % confidence interval, 1.16–3.72; p = 0.03). Conclusion In patients with heart failure and an LV ejection fraction of <35 %, the presence of Q waves in the synthetic V7–9 lead was associated with increased all-cause mortality and incidence of hospitalization after CRT device implantation." @default.
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- W4327717846 date "2023-07-01" @default.
- W4327717846 modified "2023-10-14" @default.
- W4327717846 title "Impact of Q wave in synthesized V7–9 lead on long-term outcomes after cardiac resynchronization therapy" @default.
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- W4327717846 doi "https://doi.org/10.1016/j.jjcc.2023.03.005" @default.
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