question: I put the needle down 4 year s ago, but the 2ND week in March I picked it up again to shoot mdpv, and can t seem to put it back down. I am 47, and had a heart attack at age 40. Shooting was my first and only love, but I did manage to quit once. Anyway, I have a stethascope and like to listen to my heart beacause it, I call it off beat s, after an hour or so of shooting. And, I had a heart murmur, my Doctor told me it was gone, but when I shoot I really hear it and it has like a click that I been hearing???