Aery supply to Koch's triangle is from:: (A) Right coronary aery, (B) Left coronary aery, (C) Left anterior descending aery, (D) Aery from anterior aoic sinus
Answer is A. Koch's triangle (and AV node) is supplied by right coronary aery in majority of population. 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