If the dr.'s aren't worried, it's normal hypertrophy from exercise. Most athletes get it to some degree, and it's not related to AS usage. There have been several studies done on weightlifters, almost all of them had enlarged hearts, whether or not they used AS. If it's LVH that's ok, if your entire heart were enlarged due to high BP, then that would be bad, but they'd have told you if you were in danger bro.