Atrioventricular nodal reentry tachycardia
Alerts and Notices
Synopsis
AVNRT is caused by a short circuit loop created by the existence of 2 electrical pathways within the AV node termed the "fast" and "slow" pathways. "Typical" AVNRT refers to antegrade conduction down the slow pathway, with the fast pathway serving as the retrograde limb. "Atypical" AVNRT involves antegrade conduction down the fast pathway, and the slow pathway serves as the retrograde limb.
AVNRT is more common in women than men. Patients usually present after 20 years of age, with a mean age of onset of 32 years old. AVNRT makes up two-thirds of all PSVTs.
In most cases, there is no apparent precipitating cause or trigger for episodes of AVNRT. However, in some patients, nicotine, alcohol, stimulants, exercise, activities, or medications may contribute, possibly by increasing vagal tone.
Codes
ICD10CM:I47.1 – Supraventricular tachycardia
SNOMEDCT:
251166008 – AV nodal re-entry tachycardia
Look For
Subscription Required
Diagnostic Pearls
Subscription Required
Differential Diagnosis & Pitfalls
- Atrioventricular reentry tachycardia
- Atrial fibrillation
- Atrial flutter
- Multifocal atrial tachycardia
- Atrial tachycardia
- Junctional ectopic tachycardia
- Sinus tachycardia
- Inappropriate sinus tachycardia
- Ventricular tachycardia
Best Tests
Subscription Required
Management Pearls
Subscription Required
Therapy
Subscription Required
Drug Reaction Data
Below is a list of drugs with literature evidence indicating an adverse association with this diagnosis. The list is continually updated through ongoing research and new medication approvals. Click on Citations to sort by number of citations or click on Medication to sort the medications alphabetically.Subscription Required
References
Subscription Required
Last Reviewed:07/14/2020
Last Updated:07/21/2020
Last Updated:07/21/2020
Atrioventricular nodal reentry tachycardia