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• W4377016066 abstract "Left ventricular (LV) pacing remote to the latest LV electrically activated site (LEAS) may diminish efficacy of cardiac resynchronization therapy (CRT). However, this has not been evaluated rigorously using global LV mapping. Test whether the distance “dp” between LV pacing site (LVPS) and LEAS influences the rate of CRT response. Consecutive CRT patients in 5 centers underwent noninvasive 3D electrical activation mapping and torso CT 6-24 months post-implant. LVPS, LEAS and dp were assessed. LV end-systolic volume (LVESV) reduction of ≥15% at clinical follow-up defined response. Logistic regression probabilistically modeled Non-Response; variables included demographics, heart failure classification, left bundle branch block (LBBB), ischemic heart disease, atrial fibrillation (AF), baseline QRS duration, baseline ejection fraction (EF), baseline LVESV, comorbidities, use of CRT optimization algorithm, ACE inhibitor/ARB, beta-blocker, diuretics, and dp. Of 111 patients (age 64 ± 11 years, baseline LVEF 28 ± 6%, baseline QRS duration 172 ± 21 ms, baseline LVESV 183 ± 87 mL, implant duration 12 ± 5 months (mean ± SD); 93%/7% had class I/IIa CRT indication, 31%/69% had NYHA Class II/III, 74% were males, 98% had LBBB, 38% had ischemic heart disease and 18% had a history of AF), 67% responded at 10 ±3 months post-implant (55% and 75% for ischemic and non-ischemic patients, respectively). LEAS were outside the mid and basal lateral segments in 35% of the patients. dp was 42 ± 23 mm (range 2-137): 31 ± 14 mm in Responders vs 63 ± 24 mm in Non-Responders. The distance dp, and the use of CRT optimization algorithms, remained the only independent predictors of non-response (area under the curve (AUC) 0.906). dp = 47 mm delineated Responders from Non-Responders (AUC 0.931). The distance between LV pacing site and site of latest electrical activation is a strong independent predictor for CRT response. Non-invasive electrical evaluation to characterize intrinsic activation and guide LV lead deployment may improve CRT efficacy." @default.
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• W4377016066 date "2023-05-01" @default.
• W4377016066 modified "2023-09-26" @default.
• W4377016066 title "CI-452767-4 NON-INVASIVE 3D ELECTRICAL ACTIVATION MAPPING TO PREDICT CRT RESPONSE: SITE OF LATEST LV ACTIVATION RELATIVE TO PACING SITE" @default.
• W4377016066 doi "https://doi.org/10.1016/j.hrthm.2023.03.252" @default.
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