I have ectopic heartbeats and irregular heartbeat,just lately i have been so breathless, ive had 2 chest xrays oth normal,FBC-normal, 2 holter mons that showed benign ectopic beats a heart scan that showed normal heart, I cannot breath,the dr has ruledout asthma,i think its no coincidence that the breathlessness coincides with when my heart is beating irregulary/skipping, can a irregular heartbeat cause this breathlessness, can it cause other irregularitys eg atrial fib, will it killme,i get chest pain with it, my auntie had a heart attack at 32, i have normal blood pressure, my bloodoxygen is 97-is that normal,if there was a problem with my heart would it be low? what could be causing the breathlessness,sorry for all the questions.Liz