To be honest, my Father is undergoing tests at the moment, but I think they are more for the sake of making sure than anything else, about 8 weeks after his heart attack, some idiot jumped the lights at 50 miles an hour and smacked into the side of his car, writing it off, there's some concern, because of his blood-thinning medication, that he may have internal bleeding, but to be sure, they are checking every possibility, because of the symptoms he had could also be indicative of prostrate problems.
Personally, I don't feel like it is anything to worry about, and for a good few weeks before his heart attack, I knew, at some level, that something was wrong, kind of like an Aura that made me feel 'uneasy' about his health, but I couldn't quite identify it, I've got no such feeling this time.