Latency During Left Ventricular Pacing From the Lateral Cardiac Veins: A Cause of Ineffectual Biventricular Pacing
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.
(PACE 2006; 29:574–581)
(PACE 2006; 29:574–581)
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Keywords: biventricular pacing; cardiac resynchronization therapy; congestive heart failure; latency; left ventricular pacing
Document Type: Research Article
Affiliations: Arrhythmia Service and Division of Cardiology, Tampa General Hospital and University of South Florida, Tampa, Florida
Publication date: 2006-06-01
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