I have a pulse oximeter, I don't have panic attacks like you're describing. I don't know I'm having one. My brain produces the biological fight/flight effect while my mind is preoccupied worrying about something like numb toes or cold feeling in my legs. I can breathe fine, my heart is not racing, I'm not having PVCs, I'm having a feeling of spaciness. So twice during these I didn't know it was a panic attack, I thought it was a symptom of high blood pressure, and of course I'm freaked out when I'm taking the BP and it is sky high because I'm freaked out. Then I'm more freaked out because I"m sure I'm going to stroke out. That's why I called 911 the first time. The paramedics told me it was anxiety. I'm old enough to stroke out. I just don't happen to be a present candidate apparently or I already would have. I have to stop the subconscious panic attacks. I think medication is the only way, I hope the psychiatrist has something I haven't already tried that messed meup. TY for your reply.