Which of the following is not a boundary of the Koch's triangle?: (A) tendon of todaro, (B) IVC opening, (C) coronary sinus ostium, (D) septal cusp of tricuspid valve
Answer is B. Koch's triangle boundaries tendon of Todaro opening of coronary sinus at the base septal cusp of tricuspid valve (. atrio ventricular valve) AV node at apex