Feels like my heart is going burst out of my chest it's skipping so many beats and the kardia 6 lead reader says my hearts going fine!! But!!! If I want to spend $13/month (after I've spent $300) on the reader) they'll look a bit harder. Complete waste of time and money. I'd be better of buying a toy stethoscope. Would provide just as much useful information and cost a whole lot less.