- AVRT is a specific type of Supraventricular Tachycardia (SVT)
- can be initiated by a closely coupled PAC
- block is in the accessory pathway
- but conducts through the AV node
- retrograde conduction via accessory pathway
- inverted P wave produced by retrograde conduction visible in the inferior ECG leads
- ![[AV Reentrant Tachycardia AVRT-1745549312487.webp]]
![[AV Reentrant Tachycardia AVRT-1745549386132.webp]]
Wolff Parkinson White
See WPW
Ablation
- Radio frequency ablation of the accessory pathway is often indicated in patients with WPW who are at risk of sudden death due to atrial fibrillation with a rapid ventricular response via the bypass tract.
- Note the disappearance of the preexcitation delta wave in the QRS with catheter ablation.