Jeez-Louis, I'd say it might have a little to do with the stress.
I'm usually only a lurker on the boards, but I thought I'd throw you a warm fuzzy or something.
Take your doctor's advice! Next time your heart starts skipping a beat, and it's not because the man of your dreams has just knelt at your feet, get yourself to the hospital!
Sometimes these things don't have anything to do with your usual risk factors. Sometimes the wiring in our nervous systems is off and that's just as dangerous.