AP19-00675 Abstract View

Introduction : Cardiac resynchronization therapy (CRT) is required to ensure delivery of a high percentage of ventricular pacing and capture of a significant portion of left ventricular (LV) myocardium. Recently, effective CRT with an automatic electrogram (EGM)-based algorithm enabled us to quantify the percentage of effective LV pacing by detection of QS/QS-r morphology on the unipolar LV EGM. The purpose of this study was to evaluate the correlation between the percentage of LV pacing recorded by 24-hour Holter monitoring (%Holter pacing) and that of effective LV capture by effective CRT (%e-CRT pacing).