What is the role of wave morphology 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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The morphology of the flutter wave can predict findings in the electrophysiology laboratory. A negative flutter wave in the inferior limb leads and a positive flutter wave in V1 are highly predictive of a counterclockwise circuit; however, with positive flutter waves in the inferior limb leads and negative flutter waves in V1, differentiating between clockwise typical atrial flutter and atypical forms of non–isthmus-dependent intra-atrial reentry is difficult.

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