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Trends in US Hospitalization Rates and Rhythm Control. Introduction: The impact of trials comparing rate versus rhythm control for AF on subsequent use of rhythm control therapies and hospitalizations at a national level has not been described.

Methods and Results: We queried the Healthcare Cost & Utilization Project on the frequency of hospital admissions and performance of specific rhythm control procedures from 1998–2006. We analyzed trends in hospitalization for AF as principal diagnosis before and after the publication of key rate versus rhythm trials in 2002. We also reviewed the use of electrical cardioversion and catheter ablation as principal procedures during hospital admissions for any cause and for AF as principal diagnosis. We additionally appraised the overall outpatient utilization of antiarrhythmic drugs during this same time frame using IMS Health's National Prescription Audit.™ Admissions …