Junctional tachycardia

Junctional tachycardia is a form of supraventricular tachycardia characterized by involvement of the AV node.

It is a tachycardia associated with the generation of impulses in a focus in the region of the atrioventricular node due to an A-V disassociation.

[3] It may also be due to onset of acute coronary syndrome, heart failure, conduction system diseases with enhanced automaticity, or administration of theophylline.

[4] On an EKG, junctional tachycardia exhibits the following classic criteria:[2] It can coexist with other superventricular tachycardias due to the disassociation between the SA node and the AV node.

[citation needed] Forms of junctional tachycardia include junctional ectopic tachycardia (JET) and atrioventricular nodal re-entrant tachycardia (AVNRT) which can be distinguished by performing electrophysiological studies.

Junctional tachycardia (rate about 115/min) dissociated from a slightly slower sinus tachycardia (rate about 107/min) producing one form of double tachycardia; pairs of ventricular capture (C) beats (5th, 6th, 19th, and 20th beats); see laddergram.