Why the study?
Does long LV lead electrical delay (≥ 50% of QRS) improve clinical outcomes in CRT patients with apical LV leads compared to short LVLED?
Does long LV lead electrical delay (≥ 50% of QRS) improve clinical outcomes in CRT patients with apical LV leads compared to short LVLED?
In CRT patients with apically positioned LV leads, a long LV lead electrical delay (≥ 50% of QRS) is associated with improved long-term clinical outcomes and LV remodeling.
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Supports LVLED as prognostic marker in apical CRT; leaves open whether it guides lead positioning.
Kandala et al. (2012) studied this question.
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