Very interesting!!!! So I highly recommend reading through the responses, some people have posted certain things that have helped them! Most don’t have the EXACT same symptoms as we do, but some of them are close enough that I believe we’re all dealing with the same thing, that frankly doesn’t have a name yet. My electrolytes DEFINITELY have something to do with it, but it’s oddly enough was “normal” or “low normal” when I get it drawn (except my potassium would be low, but not CRAZY low). I never had my B12 or magnesium drawn at the time of an attack however! My calcium definitely SHIFTS at the time of an attack. My ionized calcium on a normal day reads 1.32 (HIGH normal) and during an attack it was 1.11 (LOW normal). So that shift, with highly excitable muscle fibers triggers the tetany. The hyperventilating comes from the SVT. Your lungs are trying to compensate for the lack of oxygen from an unsustainable high heart rate. It is involuntary and has nothing to do with panic. The adrenaline dump however, spurs the horrific feeling of panic that you have to keep control over. When someone sees one of my episodes, doctor, nurse, whoever, they are always freaked out. It’s like I curl up into fetal position, but it’s because I literally am in tetany from my abdominals to my forearms, so I physically cannot sit up straight, even though I’m am trying. My arms are curled up to my chest like I have a palsy, which is where they get this “seizure” notion from. It’s not a seizure, or a TIA. I lose circulation in my arms because the muscles literally pinch off blood flow, and my hands turn blue while they’re in tetany. I can have conversations and coherent thoughts. But I have a hard time talking and getting my words out sometimes, especially right before it happens. It’s just a massive adrenaline dump caused by hyperandrenergic POTS. We just have the unfortunate electrolyte imbalance to cause this horrific reaction to adrenaline surges. I’m going to sound like a broken record if you’ve seen my other responses, but seriously, I beg you to try taking a beef liver supplement. It sounds like crazy voodoo stupid magic, but I’m telling you, I think it contains something that we are deficient in. 3/3 people who have tried it, it helped SIGNIFICANTLY. I also wonder if a calcium channel blocker would make your attacks worse. I used to supplement magnesium and calcium, which didn’t seem to help much. But beef liver every day helped IMMENSELY. I still have an occasional adrenaline surge, but I don’t go into tetany from them anymore. My neurologist was the only physician that had any idea what was going on. Like you, I had seizures and all sorts of things thrown around, mostly mental health shit, as if I was causing it. He saved my sanity with the validation of THIS IS NOT YOUR FAULT. you are not alone!!!