What is the role of atrial rate in the diagnosis of atrial flutter (AFL)?

Updated: Nov 18, 2019
  • Author: Lawrence Rosenthal, MD, PhD, FACC, FHRS; Chief Editor: Jeffrey N Rottman, MD  more...
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In typical atrial flutter, the atrial rate is usually 250-350 beats/min. The ventricular response may be regular or irregular. In patients with typical atrial flutter, class IA and IC antiarrhythmic drugs and amiodarone can reduce the rate to approximately 200 beats/min. If this occurs, the ventricles can respond in a 1:1 fashion to the slower atrial rate. The rate in atypical flutter is usually 350-450 beats/min.

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