Dual AV Nodal Pathway Physiology — RCES Exam Glossary

The fast pathway (superior/anterior along the tendon of Todaro, rapid conduction, long refractory period) and slow pathway (inferior/posterior near the CS ostium, slower conduction, shorter refractory period) within the AV node, forming the anatomical substrate for AVNRT.

Triangle of Koch bounded by the tendon of Todaro, the tricuspid annulus and the coronary sinus ostium, with the AV node at the apex, the fast pathway along the tendon of Todaro, and the slow pathway near the coronary sinus ostium. — Fast and slow pathways inside the Triangle of Koch — the anatomical substrate for AVNRT.

Domain: EP Anatomy & the Conduction System · Blueprint: RCES exam guide

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