My father has severe arrhythmia and heart failure, and unfortunately his heart stopped for abour 8 to 10 mins 9 days ago. he never gained consciousness after CPR worked and he was brought back to life. Ever since, he is breathing via respiratory device and they are trying to treat him for heart, a little lung infection because of the device. The doctors ran a tomogrophy, and tomogrohpy did not show any affected area. He is able to respond to pain, move his hands/legs a lot, and carry out reflex movements like squezing hands and even pulling out his IV and his respitory device from his mouth. He was able to open his eyes upon touching and sometimes tracking the person in front of him, but these two days that is not happening much at all, too. What I dont understand is, if his tomogrophy is clean, why is not gaining consciousness? the doctors dont want to run an MR, and I am scared that there can be something missing that is not treated. Do you have any idea what may be happening and if there is any chance he will regain consciousness?