Hi, may I answer your health queries right now ?  Please type your query here...when i am sitting down or lying in bed my heart races for about 5 seconds then returns to normal. There is  no pain but just momentarily takes my breath away. I am 42, 53kg (i.e. slim) and otherwise healthy
Howell come to ChatDoctorI really appreciate your concern, most of the time it is the palpitation may be due to some cardiac disease of nonspecific, but it requires differentiation and for that better to do the cardiac evaluation tests, but more precise would be halt monitoring this would give better clue serum electrolyte may also give some ideas if is not in balance hope this information helps.