Accessory pathway ablation location is typically at which area?

Accessory pathway ablation location is typically at which area?

• A. AV annulus
• B. Interatrial Septum
• C. Mitral Valve Annulus
• D. Pulmonary Vein Ostium

Answer: (A)

Accessory pathways arise from abnormal muscular connections between atrial and ventricular myocardium that most often sit along the AV ring. Ablation targets the insertion sites on this ring, which encompasses both the mitral and tricuspid annuli. Because the AV annulus covers these regions, it’s the broad and most reliable location to interrupt the bypass tract. While specific pathways can appear near particular annuli, the general and most consistent target is the AV annulus itself. The interatrial septum and pulmonary vein ostium are not typical sites for these pathways, and the mitral valve annulus is contained within the AV annulus, so the broader AV annulus designation best reflects the common location.

Accessory pathways arise from abnormal muscular connections between atrial and ventricular myocardium that most often sit along the AV ring. Ablation targets the insertion sites on this ring, which encompasses both the mitral and tricuspid annuli. Because the AV annulus covers these regions, it’s the broad and most reliable location to interrupt the bypass tract. While specific pathways can appear near particular annuli, the general and most consistent target is the AV annulus itself. The interatrial septum and pulmonary vein ostium are not typical sites for these pathways, and the mitral valve annulus is contained within the AV annulus, so the broader AV annulus designation best reflects the common location.