Re: Stree ECHO
Well, according to my cardiologist, it can. I mean, I'm sure nothing offers a 100% guarantee, but I was told the stress echo provides a great deal of information. In a nutshell, if I understand correctly, it can show if any areas of your heart are not receiving adequate blood flow (and thus not contracting fully) due to a possible blockage, as well as revealing any structural defects in the heart (i.e. a valve problem).
I just had a stress echo on Monday, and like you, it was skipped beats that brought me to a cardiologist. It turned out well, and she gave me leave to do any sort of strenuous exercise I please, so I assume she considers it a definitive test (and my cardio doc runs on the overzealous side, IMO)
Maybe someone more knowledgible could discuss whether the stress echo would reveal electrical problems, or at least the need for further testing. Again, it seemed to thoroughly satisfy my doctor, but perhaps every case is different. Still, a good result ought to give you considerable peace of mind.
Have you already had your test, or are you still waiting to have it? Has your doctor explained the nature of your skipped beats? (mine turned out to be innocuous PACs, with a definite anxiety connection)