They never have determined what was going on with me. I started passing out. They checked and were supposed to put me on a heart monitor for a week but didn't have the equipment available. I started timing my own heart rate the crude way with a watch or just counting and monitoring pulse. I found my pulse was irregular with differing intervals between beats and that the more serious condition was pauses between beats of two, three or four seconds. I don't know how much of a pause is necessary to put me on the floor, but expect that it exceeds four seconds.
They don't have a clue. We running me through some simple exercises it was found that my bp would decrease and continue to decrease as the exercise continued, but when they put me through stress tests this condition was somehow hidden. To much of current procedure is a guessing game of trial and error and with the insurance companies calling the shots comprehensive investigation is unlikely. None of it works like House on TV; little of that sort of curiosity exists in the medical world.
There are too few doctors, too few students being trained; the quotas for class sizes are so tight that the supply of doctors trained in the US is the weakest in the world per capita. Health care is a business not a social issue for quality of life. Be thankful that groups like Inspire exist to provide and share information.