Multifocal Atrial Rhythm vs Wandering Atrial Pacemaker

Mutifocal Atrial Rhythm / Multifocal Atrial Tachycardia:

Belong to a group called Multifocal Atrial Arrhythmia (MAA). The electrocardiographic criteria for the diagnosis of MAA that includes both MAT (atrial rate ≥ 100 beats/min) and MAR (atrial rate < 100 beats/min) consisted of a variable P-wave morphology of at least 3 different configurations and an irregular PP and PR interval

Wandering Atrial Pacemaker:

VARIANT OF SINUS ARRHYTHMIA - involves passive transfer of the dominant pacemaker focus from the sinus node to latent pacemakers that have the next highest degree of automaticity located in other atrial sites (usually lower in the crista terminalis) or in AV junctional tissue. The change occurs in a GRADUAL fashion over the duration of several beats; thus, only one pacemaker at a time controls the rhythm, in sharp contrast to AV dissociation



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