ECG RHYTHM LAB

Wandering Atrial Pacemaker

The atrial pacemaker shifts between foci without tachycardia.

Generated six-second Lead II example · 70 bpm target rate · not a patient recording.

Typical rate

Below 100 bpm

Regularity

Irregular

P waves

At least three distinct shapes

PR interval

Varies

QRS

Usually narrow

What to look for

Changing P-wave shapes and PR intervals distinguish this from sinus arrhythmia.

Show this rhythm

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