we do have a medical expert with us now doctor anthony cardillo is an emergency room specialist and joins us from los angeles and former nfl player doctor ma since we last spoke we now have the statement, and it is a lot more information than we had before. a cardiac arrest, known why hamlin suffered a cardiac arrest, his heartbeat was restored, and he is now sedated in critical condition. so three data points there, walk us through what they would be. >> okay, so this is substantial information, and is very reassuring to find that they actually restore cardiac activity on the field. this is critical, it will be critical in this further developments. now, it sounds like we are finding out he had cardiac arrest on the, field a lot of us have been looking at these videos, and surmising that would most likely happen is a traumatic cardiac arrest. when he was it in the chest, as hard as he was, it is a phenomenon known as -- this is when you get traumatic injury to the area of the chest just as the heart is getting prepared to have another beat. it is during that we polarization face in the e

emergency room physician and deputy dean at brown university school public health, and, doctor anthony cardillot a sense of what we saw. i want to make, clear there has been no official statement about the medical condition other than he is in hospital with critical condition, but no official statement about the nature of the injury itself. so, doctor, first to you, what did you see? >> so, i actually am on vacation, arranged monday in order to see the bills game. i'm a lifelong bills fan, and so i was sitting and watching the game with my family. and when you first watched, it looked like irregular tackle. you then went down, you saw folks come out to the field, so i'm surrounded, my fellow emergency physicians rushed out to treat him and very quickly realized something had gone horribly wrong. >> and based on the type of treatment and the placement of the hat, the collision itself, cpr, we are told maybe a defibrillator, the collision appeared to be in the area of his chest, what does that tell? you >> saw what that suggests to me is that most likely, this was something called commotion quart