Persons who have mild to severe heart valve regurgitation, which is usually diagnosed as a murmur, should consult with their doctors before beginning or continuing with a weightlifting or isometrics program. eMedicine - Aortic Regurgitation : Article by Robert J Hilkert, MD, FACC

That was a great article and answered a lot of my questions regarding my own situation. I find my greatest discomfort in the form of palpatations when lifting or doing isometrics. The more my body adapts to the routine, the less frequent they become. My dr noted nothing sigificant on the last EKG other than its a "tad" more "sloppy" than my last measurement 3 years ago. Basically a bit more regergetation. She said to simply monitor how I feel during those exercises that obviously stress my heart, slow when palpatations strike, to measure heart rate in relation to my perception of output and to nix caffeine. I had to nix it anyway due to the stomach thing so I had no choice.

Thanks for this info though, it was a really helpful read.