This occurs for two reasons: 1) the negative effects that AF has on HF in general and 2) when conducted to the ventricles with an R-R interval similar or shorter than the lower pacing rate, AF completely or partially precludes biventricular pacing. Because of the frequent co-occurrence of AF and HF, AF is often present in CRT patients and can have a significant negative impact on the CRT response. Cardiac resynchronization therapy (CRT) is a highly effective therapy for many patients with HF and dyssynchrony of inter- and intraventricular electromechanical activation. OBEL, MD, MRCPġ University of Texas Southwestern Medical Center, Dallas, TXįollow Atrial fibrillation (AF) and heart failure (HF) commonly coexist and exacerbate each other's course. Maximizing Cardiac Resynchronization Therapy in Patients With Atrial FibrillationġMONICA Y.
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