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Posts Tagged ‘define junctional tachycardia jt’

Junctional tachycardia(JT) is often a misunderstood arrhythmia. Technically,  any tachycardia arising from the AV junction could be termed as JT.Even AVNRT was considered as a form of Junctional tachycardia till recently.The crux of the issue is , true anatomical extent and borders of  so called AV junction is  yet to be clearly demarcated .The common perception that  AV node is a discrete  structure is  an anatomical illusion  , rather its collection of  condensed fibers with proximal  nodal approach and distal fanning .

Now , we have a  proper definition by the apex scientific bodies  ACC/AHA/HRS 2015)

definition of junctional tachycardia

Source :2015 ACC/AHA/HRS guideline for the management of adult patients with supraventricular tachycardia: Executive summary A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society April 2016Volume 13, Issue 4, Pages e92–e135

Please note :The key point is , JT by definition  should  be a focal  /automatic tachycardia either due to triggered activity or after depolarisation and the boundaries of  junctional tissue is liberally extended up to  His bundle.

Read  related post  :What does the term junctional tachycardia mean in current era?

Reference

http://www.heartrhythmjournal.com/article/S1547-5271%2815%2901188-1/pdf

 

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