Around Christmas I started getting palpitations at times. Went to ER and they found nothing wrong. A couple weeks later the same thing. They sent me to a Cardiologist and I've had a calcium scoring, echo, nuclear stress test, coronary artery CT and a tilt table test. The reason for the last one because the stress test was inconclusive due to too fast a heart rate while on the treadmill. I passed out on the tilt table after nitro was given. I have my follow up, but it seems my HR goes up when standing. I went to a vascular doc too and the circulation in my legs, particularly my feet wasn't good. I think I have postural orthostatic tachycardia syndrome or POTS. That's what the cardiologist mumbled when I was on the treadmill. At one time it was considered psychosomatic, but now there are over 12 underlying diseases/disorders that can cause it, a lot autoimmune, some metabolic, others injury, surgery, infections. On top of this, I have spine issues. Had L4-5 fusion around Halloween and now my cervical guy says it's imperative I get c2-4 fused. I already have c4-6 fused. On top of this I have diplopia from 4th cranial nerve palsy that came on in September. I've lost a lot of weight from doing Keto, down to 215 from 382. I try to do the right thing and I am falling apart. Has anyone here gotten POTS?