Atrial Flutter Differential Diagnoses

Updated: Nov 21, 2017
  • Author: Lawrence Rosenthal, MD, PhD, FACC, FHRS; Chief Editor: Jeffrey N Rottman, MD  more...
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Diagnostic Considerations

Coarse atrial fibrillation may mimic atrial flutter over limited electrocardiogram (ECG) strips. Prolonged recordings will uncover an irregular rate and variation in P wave morphology (as compared to a regular rate and P wave morphology with atrial flutter).

The ECG should be reviewed for the following:

  • Artifact from tremor
  • Atrial tachycardia with atrioventricular block
  • Atrial tachycardia, multifocal
  • Narrow-complex tachyarrhythmias
  • Wide-complex tachyarrhythmias

Differential Diagnoses