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  Vol. 165 No. 16, September 12, 2005 TABLE OF CONTENTS
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Principal Atrial Fibrillation Discharges by the New ACC/AHA/ESC Classification

Brian J. Dixon, MD; Yiscah Bracha, MS; Steven W. Loecke, MD; Marco A. Guerrero, MD; Richard D. Taylor, MD; Richard W. Asinger, MD

Arch Intern Med. 2005;165:1877-1881.

Background  The American College of Cardiology, American Heart Association, and European Society of Cardiology Board (ACC/AHA/ESC) 2001 guidelines for management of patients with atrial fibrillation (AF) include a new classification system consisting of 4 categories: first-detected episode; recurrent paroxysmal (self-terminating); recurrent persistent (requiring cardioversion); and permanent. The frequency of hospital discharges within these categories has not been reported.

Methods  The new classification system was applied to 135 consecutive hospital discharges with a principal diagnosis of AF.

Results  Classification of AF in these discharged patients included 74 (55%) with first-detected episode; 28 (21%) with recurrent paroxysmal AF; 17 (13%) with recurrent persistent AF; and 16 (12%) with permanent AF. Hypertension (n = 48; 35%) was the most common primary cause of AF, followed by alcohol related (n = 23; 17%), coronary artery disease (n = 20; 15%), and valvular heart disease (n = 17; 12%). For the 102 patients with first-detected and recurrent paroxysmal AF, 71 (69%) converted spontaneously to normal sinus rhythm within 48 hours of admission. Of the 48 patients with a discharge diagnosis of AF, 32 (67%) were receiving anticoagulation therapy.

Conclusions  Most hospital discharges with a principal diagnosis of AF represent the first-detected episode. Diverse causes contribute to AF, and to examine them would help direct therapy. Importantly, in our analysis, 69% of those patients with first-detected or recurrent paroxysmal AF converted spontaneously to normal sinus rhythm within 48 hours of admission.


Author Affiliations: Hennepin County Medical Center (Drs Dixon, Loecke, Guerrero, Taylor, and Asinger), Minneapolis, Minn; University of Minnesota, Minneapolis (Drs Guerrero, Taylor, and Asinger); and Berman Center for Outcomes and Clinical Research, Minneapolis (Ms Bracha).



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