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 ...

Stretch could affect trans-sarcolemmal Na+/Ca++ exchange, triggering ectopic excitation and inducing atrial and ventricular arrhythmias ... non-sustained ventricular tachycardia (≥3 consecutive beats) ...

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.