I have mitral valve prolapse and arrythmia and every now and then when I lay down my breathing is off sometimes. I ve ben taking jack 3d 2 scoops before each weight lifting workout just started last week usually work out about 3-4 days a week. I also take 1 pill of recreate in the morning and 1 pill when i leave work. Even before I started Jack3d I was getting a feeling like my heart stops (obviously its not). I m just curious if I continue to take the Jack3d will I be running a high risk of heart attack or possible fall into cardiac arrest? I m only 27, can that happen to me? I don t do cardio when i take this stuff, just weight lift and I take my time as I workout with 2 other ppl.