Here you can see the medial mitral commissure. As you can see the difference of the chordae thendineae for the commissure is attached to the edge of the valve, in this case is the medial mitral commissure; the rest of the chordae are attached to the ventricular region of the valve. LA: Left Atrium; MV: Mitral Valve; LV: Left Ventricle; red square in fig A is shown in fig B the commisure of the mitral valve.

Image #collage comisura 1