This ectopic focus becomes the predominant pacemaker of the heart. When the atrial rate is greater than 100 beats per minute, the rhythm is atrial tachycardia. If less than 100 beats per minute ...

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 ...

Increased ectopic pacemaker activity with digitalis. Avoid other sympathomimetics. Fruit juices (eg, grapefruit, orange, apple) may reduce plasma levels.