I have been in a+e on 3 occasions for taking too much ecstasy (ive always taken large doses and can feel my heart going 90 for days after), I have always felt this would have a lasting effect on my heart. However my resting heart rate is around 58, I have stopped smoking, drinking and taking drugs and my BMI is 22, I am 24 years of age, would it possible that any damage I may have done will subside after a few years of complete abstinence?