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Atrioventricular nodal reentry tachycardia
Other Resources UpToDate PubMed

Atrioventricular nodal reentry tachycardia

Contributors: Navya Akula MD, Ryan Hoefen MD, PhD
Other Resources UpToDate PubMed

Synopsis

Atrioventricular nodal reentry tachycardia (AVNRT) is a paroxysmal supraventricular tachycardia (PSVT) caused by a reentrant pathway within the atrioventricular (AV) node resulting in a regular tachycardia (120-200 beats per minute [bpm]). Symptom onset and termination is usually abrupt.

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

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

Best Tests

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Management Pearls

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Therapy

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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.

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References

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Last Reviewed: 07/15/2020
Last Updated: 07/22/2020
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Atrioventricular nodal reentry tachycardia
Atrioventricular nodal reentry tachycardia : Chest pain, Dizziness, Fatigue, Heart palpitations, Syncope, Tachycardia, Dyspnea
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