How do typical (or classic) and atypical atrial flutter (AFL) differ?

Updated: Nov 18, 2019
  • Author: Lawrence Rosenthal, MD, PhD, FACC, FHRS; Chief Editor: Jeffrey N Rottman, MD  more...
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Answer

Typical (or classic) atrial flutter involves a single reentrant circuit with circus activation in the right atrium around the tricuspid valve annulus. The electrical wavefront most often propagates in a counterclockwise direction. Atypical atrial flutter follows a different circuit; it may involve the right or the left atrium. (See Pathophysiology.)


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