Wandering atrial pacemaker occurs when multiple areas (ectopic foci) within the atrium generate consecutive action potentials that are all conducted to the ventricles. Thus, each QRS complex will ...

Multifocal atrial tachycardia occurs when multiple areas, or ectopic foci, within the atrium generate consecutive action potentials that are all conducted to the ventricles. Thus, each QRS complex ...

Figure 2 Electrocardiogram (Lead 2 only), Showing Rapid, Irregular Atrial Tachycardia at a Rate of 175 per Minute, with Beats Probably Arising in Multiple Foci, in a Sixty-five-Year-Old Man with ...