i started having the extra beats or some called them pvcs,when i was about 25, i am now close to 49 female. i have had stress testing and holter monitors done about every 2 years, they find nothing,they say anxiety causes them,as does alot of coffee,caffeine. i have had some abnormal stress tests, so have had 2 catheters,still normal. these sometimes are like skipped beats,they sometimes come together like skip,skip,skip,and sometimes a skip, then my heart races for about 6-10 seconds. they still scare me some. i have found that if i get up and do something, they go away. for peace of mind,though sometimes that is not possible, see your doctor and get those tests done. and then, you just might have to live with them. as long as you dont have chest pain, shortness of breath, or pass out, they are most likely harmless is what i have been told time and time again.