LOL - yeah - PVC as in Premature Ventricular Contractions, not polyvinal chloride.
In a panic attack or stress situation you "probably" just feel your heart racing ... but "probably" what you're feeling with these episodes is more of a heavy thumping in your chest, and secondary shortnes of breath and maybe some dizzyness if they persist for more than a minute. You may not know how to describe them ... but did I get close?
Just curious - do you live in the DFW area, and did you get the inspiration for your original self-diagnosis of "Supraventricular Tachycardia" from a TV commercial that has been airing recently? I caught part of it this morning and couldn't believe they were airing that!
Just a week to go till you get some real answers ...