Which of the following is NOT a component of the triangle of Koch?

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Multiple Choice

Which of the following is NOT a component of the triangle of Koch?

Explanation:
The main idea is the anatomy and boundaries of Koch’s triangle, which localizes the AV node in the right atrium. Koch’s triangle is formed by three boundaries: the tendon of Todaro, the coronary sinus ostium, and the septal leaflet of the tricuspid valve. The AV node sits inside this triangle, making it a key landmark during ablations. The mitral valve annulus, on the other hand, is located at the left heart between the left atrium and left ventricle and is not a boundary of Koch’s triangle. So it is not part of the triangle.

The main idea is the anatomy and boundaries of Koch’s triangle, which localizes the AV node in the right atrium. Koch’s triangle is formed by three boundaries: the tendon of Todaro, the coronary sinus ostium, and the septal leaflet of the tricuspid valve. The AV node sits inside this triangle, making it a key landmark during ablations. The mitral valve annulus, on the other hand, is located at the left heart between the left atrium and left ventricle and is not a boundary of Koch’s triangle. So it is not part of the triangle.

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