Answer :
Final answer:
The pathway ablated in AVNRT treatment is the slow pathway near the atrioventricular node, often referenced as the posteroseptal or inferior part of the interatrial septum. It is critical to disrupt the reentrant circuit to stop the tachycardia.
Explanation:
The pathway that is commonly ablated in the treatment of Atrioventricular Nodal Reentrant Tachycardia (AVNRT) is the slow pathway, which is located near the atrioventricular node (AV node). AVNRT involves the existence of two pathways (a fast and a slow pathway) which can create a reentrant circuit leading to rapid heartbeats. The exact anatomical labeling of the slow pathway can vary, but it tends to be located in the posteroseptal or inferior part of the interatrial septum area near the AV node.
This is not typically referred to as the midseptal, anteroseptal, or anterior pathway in clinical practice. Ablation targets the area where the reentrant circuit can be interrupted to stop the tachycardia. The choice of the pathway to ablate in AVNRT (option C) is based on its function rather than strict anatomical terminology. Understanding the electro-physiological properties of the heart, such as atrial depolarization and ventricular repolarization, is essential in managing this condition.
