i have a heart murmur (vsd) which is a tiny hole between my bottom two chambers of my heart and have a 3rd class unrestricted besides corrected vision, and the ame said i will have no probs getting a 1st. so dont worry.
they will find out about it cuz when they listen to your heart they can hear it. but when you get your medical take paper work w/ you from a cardiologist saying you checked out fine and you will have no prob. getting your medical.