I am 37yr old male, 195lbs, high cardio minimum 4 hrs a week for past
2 1/2yrs.
About a month ago I started getting dizzy while getting out of my car, lasts about 15-30sec and goes away. It does not happen while I am seated or standing. Once a day when I walk I almost feel the dizziness as each foot strikes the ground. During cardio excercise the first few minutes is dizzy, but then it goes away. I should say it is a dizziness sensation, but I am walking, moving straight!

I went to the ER and the doctor located a level 3 heart murmur and the EKG was normal. I now have a follow up with my doctor in 2 weeks and I'm guessing more tests.

Any ideas of what is going on?