i was born with mitral valve prolapse,thats a condition where my mitral valve in my heart doesnt open and close right.ive had a few symptoms over the years but only when i was takin those crazy fat burners that raced your heart,i would get alittle palpitations and stuff.my doc told me that my heart was bigger than the average non athletic man,he said when you train hard and heavy your heart will grow alittle and its nothing to worry about.the weird thing is that ive been doing steroids on and off for 15 years or so and never had any problems affecting my mitral valve,just the opposite,people with my condition are told to keep their blood volume up as high as possible cause it helps alot.they say 60% of the population have mitral valve prolapse and dont even know it.