There is no maximum time for an extracorporeal circulatory cardiac arrest, and usually after a cardiac arrest, cardiac surgery can be completed in about 3 hours, and the heart itself will be able to resume normal beating. During heart surgery, an extracorporeal circulatory cardiac arrest needs to be established, which is a crucial part of heart surgery. Extracorporeal cardiac arrest temporarily replaces the heart and lungs. The exact duration of the arrest depends on the length of the surgery and the surgeon’s operation. Under normal circumstances, after an extracorporeal cardiac arrest, the surgery is completed in about 3 hours and the normal beating of the heart can be restored. The extracorporeal cardiac arrest not only provides the surgeon with a wider surgical field of vision, but also ensures blood perfusion to organs such as the liver, brain and kidneys, ensuring the successful completion of the surgery and a better recovery of the body’s blood circulation after the operation. It should be noted that after establishing extracorporeal circulation cardiac arrest, the operation must be closely monitored to minimize the risk of accidents during the operation. Post-operative care of the incision should also be done to avoid complications and regular check-ups at the hospital.