AV node is situated in
Koch's triangle is an anatomical area located within right atrium, defined by Ostium of coronary sinus, posteriorly The anterior-septal leaflet commissure Tendon of Todaro ( a tendinous structure connecting the valve of the inferior venacava ostium to the central fibrous body posteriorly) Used as anatomical landmark for location of AV node during electrophysiology procedures such as pacing or ablation. Ref - researchgate.net
Opening of SVC
Interventricular septum
Koch's triangle
Interatrial septum
Thorax