Like others with CFS/ME I have weird heart issues. I have an elevated heart rate at rest, 90-98bpm. I get dizzy with prolonged standing (the time period gets shorter as I my CFS gets worse) and have to sit down but haven't been diagnosed with POTS or NMH. The cardiac guy did mention vascular insufficiency as a possible cause but nothing ended up in my official record. I find that compression stockings do help and I wear them quite frequently. I do get random chest pains, heart racing, heart pounding and butterfly in the chest effects. All of which occur more frequently on my bad days.
I bring this all up because I just watched three vids by a Dutch cardiologist that treats CFS/ME patients. Turns out I have nothing to worry about as far as my heart and lungs go. It is just my CNS acting up. Which dovetails into a paper I've been trying to read on CNS and brain inflammation. (More on that later.) So here are the three vids. I found them to be very informative. Based on the info I just learned I probably won't go to a cardiologist since they probably won't find anything. It is just my CFS/ME kicking my butt as usual.
Vid 21 ME/CFS and The Heart: http://www.youtube.com/watch?v=OwXEKqB-XTk
Vid 22 ME/CFS and Palpitations: http://www.youtube.com/watch?v=73sR6vdmLv4
Vid 23 ME/CFS and Cardiac Arrhythmias: http://www.youtube.com/watch?v=mfhZ7tUUo_c