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Hayes, David L; Boehmer, John P; Day, John D; Gilliam, 3rd, F R; Heidenreich, Paul A; Seth, Milan; Jones, Paul W; Saxon, Leslie A
Heart rhythm, 09/2011, Volume: 8, Issue: 9Journal Article
With the advent of cardiac resynchronization therapy, it was unclear what percentage of biventricular pacing would be required to obtain maximal symptomatic and mortality benefit from the therapy. The optimal percentage of biventricular pacing and the association between the amount of continuous pacing and survival is unknown. The purpose of this study was to assess the optimal percentage of biventricular pacing and any association with survival in a large cohort of networked patients. A large cohort of 36,935 patients followed up in a remote-monitoring network, the LATITUDE Patient Management system (Boston Scientific Corp., Natick, Massachusetts), was assessed to determine the association between the percentage of biventricular pacing and mortality. The greatest magnitude of reduction in mortality was observed with a biventricular pacing achieved in excess of 98% of all ventricular beats. Atrial fibrillation and native atrial ventricular condition can limit a high degree of biventricular pacing. Incremental increases in mortality benefit are observed with an increasing percentage of biventricular pacing. Every effort should be made to reduce native atrioventricular conduction with cardiac resynchronization therapy systems in an attempt to achieve biventricular pacing as close to 100% as possible.
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