what is the most difficult part of performing heart surgery?

There are many challenging aspects to performing heart surgery. One of the most difficult aspects is the fact that the heart is a complex and vital organ that is constantly in motion. This means that surgeons must be very precise and careful when operating on the heart, as any mistakes could have serious consequences. Other challenges include working in a small and confined space, using specialized equipment and techniques, and managing the patient’s vital signs during the surgery. Additionally, heart surgery can be physically and mentally demanding, as it requires a high level of concentration and endurance.