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Emilce Trucco et al. JACEP 2018;j.jacep.2017.11.020
Illustration of FOI Method (A) The atrioventricular (AV) interval is shortened by 20 ms during left ventricular (LV) pacing alone, searching for the narrowest QRS, from intrinsic conduction with a long AV interval (second left) to only LV activation with a short AV interval (right). (B) The optimal interventricular interval is then chosen by comparing the QRS duration. (C) Final electrocardiogram in different configurations: basal, nominal settings, and fusion-optimized intervals (FOI). RV = right ventricle. Emilce Trucco et al. JACEP 2018;j.jacep 2018 American College of Cardiology Foundation
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