13 hours surgery and then 7 hours of follow up surgery 3 days later. Two weeks in a coma. I slept more less for the first two months after surgery. I underwent 46 mins of Deep Hypothermic Complete Circulatory Arrest (DHCA). https://en.wikipedia.org/wiki/Deep_hypothermic_circulatory_arrest - "Deep hypothermic circulatory arrest (DHCA) is a surgical technique in which the temperature of the body falls significantly (between 20 °C (68 °F) to 25 °C (77 °F)) and blood circulation is stopped for up to one hour. It is used when blood circulation to the brain must be stopped because of delicate surgery within the brain, or because of surgery on large blood vessels that lead to or from the brain. DHCA is used to provide a better visual field during surgery due to the cessation of blood flow.[1] DHCA is a form of carefully managed clinical death in which heartbeat and all brain activity cease." Read that twice my friend. It explains why things can be a bit wonky at times. Request a complete copy of your medical records post-surgery and see if they used that technique on you. It's worth asking your cardiothoracic at your next appointment. Peace.