AVNRT ablation location is typically performed at which anatomical area?

AVNRT ablation location is typically performed at which anatomical area?

• A. Triangle of Koch
• B. Crysta Terminalis
• C. His Bundle Area
• D. Mitral Annulus

Answer: (A)

AVNRT ablation focuses on interrupting the slow pathway that participates in the reentrant circuit near the AV node. This substrate is located inside Koch’s triangle, the right atrial region bounded by the tricuspid annulus, the tendon of Todaro, and the coronary sinus ostium, where the AV node resides. Ablation here disrupts slow-pathway conduction while preserving the fast pathway and overall AV conduction, minimizing the risk of complete heart block. Ablating near the His bundle area would raise the danger of damaging the AV node itself, and the other regions mentioned (crista terminalis or the mitral annulus) are not involved in the AVNRT circuit.

AVNRT ablation focuses on interrupting the slow pathway that participates in the reentrant circuit near the AV node. This substrate is located inside Koch’s triangle, the right atrial region bounded by the tricuspid annulus, the tendon of Todaro, and the coronary sinus ostium, where the AV node resides. Ablation here disrupts slow-pathway conduction while preserving the fast pathway and overall AV conduction, minimizing the risk of complete heart block. Ablating near the His bundle area would raise the danger of damaging the AV node itself, and the other regions mentioned (crista terminalis or the mitral annulus) are not involved in the AVNRT circuit.