As you know, that is an extremely major surgery. Triple bypass with aortic valve replacement
and procedure for atrial fibrillation
is extremely extensive surgery. Factors that can affect the surgery and outcome include the condition of the patient prior to surgery, age, kidney function prior to surgery, and the condition of the heart
prior to surgery. Keep an open line of communication with the doctor and nursing staff so that your family's questions can be answered to your satisfaction. I wish the best for your father.