Typically, the atrial rate will be about 300 bpm, and only every other atrial depolarization will be conducted through the AV node ... though atrial flutter with variable conduction of the ...

atrial flutter with variable conduction and multifocal atrial tachycardia (similar to wandering atrial pacemaker). Atrioventricular (AV) dissociation occurs in complete heart block (third-degree ...