I am 16 been having palpertations for about one year now, it does not last long about 10 seconds, but I can have up too 6 in a day I had 12 once but it s rare, some times I go days without having them at all but It used to not bother me but I don t like it anymore, not sure what could be causing it, my grandma has a heart murmor wondered if I could have something similar? Any Ideas what could be causing it or what I could do about it? thank you No I m not on any tablets, only ibruphen once a month for period pain thats it. Thank you for advise I also have never smoked and vary rarely have caffine.