<s>[INST] My friend, who lives with me, passed out unexpectedly this morning while drinking coffee. At first, I thought he was choking and was going to vomit, he got up, ran to the kitchen counter by the sink, and dropped. Didn t even remember passing out. He came too very quickly, and asked where he was. He didn t seem to lose his facilities or movement, except when he fell, he hit the edge of the counter and the end table, leaving two very bad contusions on his back. He also, while he lost consciousness, bit his tongue and left a rather large slice on his tongue. Also, the portion of his lip where the tongue was injured, was black and blue. He is 65 yrs. old, and an insulin dependent Diabetic Type 2, overweight, and never excercises. What do you think? TIA, lack of oxygen, ? [/INST] Looking to the history, it seems he might had sudden heart attack, with ventricular arrhythmias which led to loss of blood to brain, which led to decrease glucose and oxygen supply to brain, which finally caused convulsion and patient succumbed . acute heart attack is one of the most common cause of sudden cardiac death. </s>