Boundary of the Kochs triangle is not formed by:
Triangle of koch is landmark for AV node with its transition zone. It is bounded by tendon of todaroQ (superiorly), tricuspid valve septal leafletQ (inferiorly) and coronary sinus orificeQ (basally)
Tricuspid valve ring
Coronary sinus
Tendon of todaro
Limbus fossa ovalis