Junctional ectopic tachycardia

**Definition:** Narrow or usual complex tachycardia originates from a focus at or near the atrioventricular junction.

**Long definition:** This form of supraventricular tachycardia originates in the av junction. This irregular heart-rate is manifest by ventricular rates between 100 and 250 bpm and rarely at 300 bpm. It may be associated with retrograde p-waves or with ventriculoatrial dissociation. It is often seen in the post-operative period after surgery for congenital heart disease. There is also a congenital form of junctional ectopic tachycardia.