Why the study?
Does epicardial QLV mapping during video-thoracoscopic surgery improve the QLV ratio compared to an empirical midventricular lateral segment in patients with LBBB or IVCD?
Does epicardial QLV mapping during video-thoracoscopic surgery improve the QLV ratio compared to an empirical midventricular lateral segment in patients with LBBB or IVCD?
Epicardial QLV mapping during video-thoracoscopic LV lead implantation is feasible and achieves significantly higher QLV ratios than empirical lead placement, potentially optimizing cardiac resynchronization therapy.
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May identify superior epicardial segments; leaves open whether QLV-guided placement improves CRT outcomes in LBBB/IVCD.
Polášek et al. (2014) studied this question.
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