it may be a pain but you really should go to your ER to get to a Cardiologist
i have Heart issues had one Heart attack and have SVT
only recently found a Good Cardiologist that said the drugs i was on were Wrong ones for it
and since he's switched me i Feel SO Much Better
But we have to keep a Close eye on it
i think because RA causes Swelling it is not just Joints but inside organs as well so why wouldn't the heart be included