Suggest Remedy For High Heart Rate

my heart rate at times when relaxing at times gets as high as 130....it has went as high as 165 which my doctor called it tachardia ...how can i lower it when it gets that high without having to go to the emergency room...i got to the end of this and you people should really tell people you hhave to pay before they go thhru all this...personally i thhink its bullshit...i will be contacting an attorney and my uncle happens to be one...thanks for nothing......