Figure 1.

Schematic of mechanism of junctional ectopic tachycardia. Right: In normal sinus rhythm, spontaneous depolarization of the sinus node results in propagation of electrical signal through the atrium. Conduction of the electrical signal occurs through the AV node to the ventricle via the bundle branches and His‐Purkinje system. Left: In junctional ectopic tachycardia, spontaneous depolarization occurs in the AV node (ie, junction) and conducts to the ventricle. There may or may not be conduction of the signal retrograde into the atrium