Left Ventricular Pacing Site-Timing Optimization During Biventricular Pacing Using a Multi-Electrode Patch George Berberian, MD, Santos E. Cabreriza,

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Left Ventricular Pacing Site-Timing Optimization During Biventricular Pacing Using a Multi-Electrode Patch George Berberian, MD, Santos E. Cabreriza, MBA, Thomas Alexander Quinn, MS, Cara A. Garofalo, MD, Henry M. Spotnitz, MD The Annals of Thoracic Surgery Volume 82, Issue 6, Pages 2292-2294 (December 2006) DOI: 10.1016/j.athoracsur.2006.04.094 Copyright © 2006 The Society of Thoracic Surgeons Terms and Conditions

Fig 1 Representative data from Chart 3.6.3/s include cardiac electrocardiogram (EKG) in mV, arterial pressure (AP) in mm Hg, and aortic (Ao) flow velocity in L/min/sec. Transition between two consecutive left ventricular pacing site/right ventricle-left ventricle delay combinations is associated with a sharp drop in arterial pressure and aortic flow velocity. (IL = inferolateral; LVPS = left ventricular pacing site; OM = obtuse margin; RLD = right ventricle–left ventricle delay.) The Annals of Thoracic Surgery 2006 82, 2292-2294DOI: (10.1016/j.athoracsur.2006.04.094) Copyright © 2006 The Society of Thoracic Surgeons Terms and Conditions

Fig 2 Response surface plot illustrates percentage change in cardiac index for each left ventricular pacing site/right ventricle–left ventricle delay (RLD) combination. Solid black lines indicate a 1% change in cardiac index. (APEX = apical; CIRC = circumflex; IL = inferolateral; IM = inferomedial; LVPS = left ventricular pacing site; OM = obtuse margin; PDA = posterior descending artery.) The Annals of Thoracic Surgery 2006 82, 2292-2294DOI: (10.1016/j.athoracsur.2006.04.094) Copyright © 2006 The Society of Thoracic Surgeons Terms and Conditions