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  • Title: Latency during left ventricular pacing from the lateral cardiac veins: a cause of ineffectual biventricular pacing.
    Author: Herweg B, Ilercil A, Madramootoo C, Krishnan S, Rinde-Hoffman D, Weston M, Curtis AB, Barold SS.
    Journal: Pacing Clin Electrophysiol; 2006 Jun; 29(6):574-81. PubMed ID: 16784422.
    Abstract:
    We report three patients with cardiomyopathy and pronounced stimulus to QRS latency during left ventricular (LV) pacing from an epicardial cardiac vein. Delayed LV activation during simultaneous biventricular pacing produced an electrocardiographic pattern dominated by right ventricular stimulation. Hemodynamic parameters improved immediately after advancing LV stimulation (in one patient) or pacing the LV only (in two patients) coupled with dramatic improvement of heart failure symptoms.
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