Michael DeBakey is famed for performing which pioneering surgery?

• A. First coronary artery bypass operation.
• B. First human heart transplant.
• C. First successful liver transplant.
• D. First pacemaker implantation.

Answer: (A)

Recognizing a surgical breakthrough that changed how doctors treat heart disease. DeBakey’s fame comes from pioneering coronary artery bypass surgery, a procedure that creates new routes for blood to reach the heart when coronary arteries are blocked. The idea is to bypass the narrowed segment by attaching a graft—often taken from the patient’s own veins or arteries—so blood can flow to heart tissue beyond the blockage. This work in the 1960s demonstrated that the heart’s blood supply could be reestablished through surgical rerouting, leading to the widespread practice of bypass grafting today. The other major operations listed—heart transplantation, liver transplantation, and pacemaker implantation—are significant achievements in their own right, but they are not the procedure DeBakey first demonstrated. Therefore, the best answer is the coronary artery bypass operation, the pioneering approach DeBakey helped establish.