Junctional tachycardia

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Junctional tachycardia is a form of supraventricular tachycardia characterized by involvement of the AV node.[1] It can be contrasted to atrial tachycardia. It is a tachycardia associated with the generation of impulses in a focus in the region of the atrioventricular node.

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.

Cause[edit]

It can be associated with digitalis toxicity.[2] It may be also be due to onset of acute coronary syndrome, heart failure, conduction system diseases with enhanced automaticity, or administration of theophylline. [3]

Diagnosis[edit]

It can appear similar to atrioventricular nodal reentrant tachycardia.[4]

One form is junctional ectopic tachycardia.

See also[edit]

References[edit]

  1. ^ "junctional tachycardia" at Dorland's Medical Dictionary
  2. ^ "Junctional Rhythm: Overview - eMedicine". Retrieved 2008-12-21. 
  3. ^ Aehlert, Barbara (2013). ECGs Made Easy (5th ed.). Elsevier. p. 160. ISBN 9780323170574. 
  4. ^ Srivathsan K, Gami AS, Barrett R, Monahan K, Packer DL, Asirvatham SJ (January 2008). "Differentiating atrioventricular nodal reentrant tachycardia from junctional tachycardia: novel application of the delta H-A interval". J. Cardiovasc. Electrophysiol. 19 (1): 1–6. doi:10.1111/j.1540-8167.2007.00961.x. PMID 17916156.