Conversation: The conversation between human and AI assistant.
[|Human|] 50 year old male with no known illnesses suddenly felt faint, dizzy then blacked out while driving thereby hitting an illegally parked car as he attempted to go to the side of the road. What may have caused this? Is this a medical emergency at that time?
[|AI|]  Hi, From what you describe it is possible this person may have suffered from a number of possible problems including, stroke, TIA, epilepsy, hypoglycemia, a cardiac or cardiovascular episode (vasovagal reaction vs. cardiac arrhythmia), or functional syncopal episode. Any time anybody suddenly loses consciousness causing loss of control of a vehicle or otherwise, causing damage due to unawareness of the environment or how they are behaving, etc. should be considered as suffering from a medical emergency.  That person should be transported to the hospital for a full and complete evaluation.  At the very least they should be restricted from Chat Doctor.  Hope I have answered your query. Let me know if I can assist you further.