Typical Atrial flutter

Typical Atrial flutter produces a “sawtooth” pattern to the flutter waves – especially in the

[A] Anterior ECG leads
[B] Lateral ECG leads
[C] Inferior ECG leads
[D] Posterior ECG leads



Typical Atrial flutter

  • Typical Atrial flutter produces a “sawtooth” pattern to the flutter waves – especially in the inferior ECG leads
  • Other forms morphologically and/or in location have been considered as “atypical” flutter.
  • Typical AFl presents as a “sawtooth” pattern on the ECG – with inverted flutter (F) waves in the inferior leads and upright F waves in V1.

How to differentiate Atypical Flutter from Typical Flutter?

Three findings that distinguish Atypical atrial flutter arrhythmia from typical atrial flutter:

Atypical Atrial Flutter

  1. Flutter rate is faster at 375 beats/minute
  2. There is no isoelectric interval between the flutter waves
  3. There is more apparent positivity in leads II, III, and avF.