What causes conversion of atrial fibrillation (AF) to 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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Numerous reports indicate that patients with atrial fibrillation who are given class IC antiarrhythmic agents may convert to atrial flutter with faster ventricular rates, even if the flutter rate is "relatively slow." Thus, patients receiving type IC agents (eg, flecainide) should also receive an AV node−blocking drug such as a beta blocker or calcium channel blocker. In patients with atrial flutter in one study, the relative risk for development of stroke was 1.4 in comparison to control subjects. [8]

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