They developed within a year because I was going to have surgery and they never told me anything was wrong until now I haven’t had palpitations since that day but my heart does race at night most of the time during the day I am fine but at night it’s when it happens and the chest pain for the most part is all day…I have an appt next Monday for my holter monitor results hopefully they don’t show anything major I will look into going to an electrophysiologist