The present invention relates to one kind for cutting off through apex of the heart aorta petal surgical cutting instrument (2), axis (4) and the execution circular cut of at least one mechanical cutting element (16) that these instruments have cutter device (6) to be arranged in Distal tool. According to the present invention, at least one cutting element (16) can be adjusted, and especially in a stepless manner, pass through the adjustment mechanism moved radially to the diameter of different aortas.
