My father lives alone and has congestive heart failure, which he takes medication for. He has circulatory problems in his legs also. He has balance issues, which he went to rehab for and while he got stronger in rehab, the balance issues still persist. He uses a walker to walk and has falls from time to time, never seriously injured, just bruises and scrapes. His recent injury concerns me though because he can't remember what happened. He has a black eye and scrape on his chin, but swears he didn't fall and doesn't know how he got the injuries. Do you think this means he had a stroke or a heart attack and passed out? I would take him to the doctor to be checked, but he is very stubborn and doesn't want to go.