ECG RHYTHM LAB

Atrial Flutter

Organized rapid atrial activity. This example uses a 300 bpm atrial rate and fixed conduction.

Generated six-second Lead II example · 75 bpm target rate · not a patient recording.

Typical rate

Atrial: usually 250–350 bpm

Regularity

Regular with fixed conduction

P waves

Continuous flutter (F) waves

PR interval

Not measurable

QRS

Usually narrow

What to look for

Look for continuous sawtooth activity, especially between QRS complexes.

Show this rhythm

Sources and limitations