Hey as some of you may know ive been having issues with crazy fast heart rate...anyway whilst i am waiting for echo and cardio appointment i have been put on these by my gp. Anyone been on this? Any side effects? How do they work ect? Also if im taking these then surely the cardiologist wont be able to pick up the dodgy heart as it will be corrected? thanks for your knowledge in advance!! love to you all xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx