I never notice any heartbeat irregularity
when standing or with activity but
when I have taken the adderall and laid
down I frequently get short, episodes of tachycardia, fluttering and/or heart pounding. I never have chest pain or sob and it only lasts approx. 20 seconds. Does laying down/leaning foreward alter the position of the heart so drastically that the electrical system is altered also? How does position affect the heart's electrical system?