An electropsyological study actualy did run wires into my heart trying to figure out what is causing the rythm problems... and agiogram isnt indicated in my case (my arteries arent blocked) - they can see by my echos, etc. (I've had holter monitors every year since I started having problems and periodic echos) - that its my heart muscle itself where the problem is (it doesnt beat strong enough - and is getting weaker - the heart muscle is getting stiffer and therefore valves leak and I dont get enough oxygen so get very short of breath... and with 3 echos in the past 3 years - has really progressed) - they are trying to determine what is causing this - because if it cant be stopped its pretty bad news.... if the underlying cause is autonomic neruopathy or other issue - they will try to control with meds (which I already have been on one for years) and ultimately tell me heart transplant if necessary... if its amyloid - the prognosis is very poor... I have a family member who died of cardio-myopathy a year older then I am now - and was so long ago they didnt have the technology to determine cause etc.... in any case - I know I've got a good doctor.....