text: i have an irregular heartbeat, why? im 15 years old and i have noticed, mostly when i am resting on couch, chair, bed, exc, my heart will do like a flip flop (or flutter like) and sometimes out of the blue it will beat hard and fast with a hint of irregular beats for about 5 sec and stop. i do have small case of seperation anxiety in which i dont know if this is will relate to the irregular beats or not.. my mom and dad dont beleive me, my docter says my hearts okay without even checking, what can it be causing irregular beats? help. im working in the cardiologist line, i can answer your questions. you have to see a cardiologist for a check up, most probably they will do tests like ecg (record ur hearbeat rhythm), treadmill stress test (to see if you have the irregular heart beat during exercise too), echocardiography/ultrasound of the heart ( to see if you have abnormal valves) and 24 hours holter (just a smalll device attached on ur body 24 hrs to record ur heartbeatfor a day).  arrhytmias (irregular heart beat) can be caused by several factors, but you are a young boy; so most likely it will be caused by premature atrial complexes or premature ventricular complexes;which is also known as skipped heart beat it has to do with the nerves in your heart muscle.  it could be inherited, trigger by stress, coffee and tea. most of the time, its not a life threatening condition, but go and see a cardiologist is my advice. i can go on explaining more about your condition in details but it this answer will ended up so long. i hope it help