I am a 40 year old female, I have had heart palpitations for the last 3 weeks at night time only, EKG is abnormal, Echocardiogram is normal, angio CT normal with 0 calcification and 0 blockages, blood work is normal, cholesterol good, blood pressure good, wore a heart monitor for 24 hours, that was also good and no palpitations showed, so what is it?