Hi there...
I thought I'd give you my thoughts on your experience since you replied to mine...a few things: You said you felt a skipped beat, and then another, followed by another 3-4 skips. So, you felt them all in succession or did you feel a normal beat in between? Did you take your pulse and was it regular? I would imagine these could be PACs or PVCs, don't know for sure unless you have a monitor. I looked at your EKGs and it looks like you may have some afib, could have been that. With the description of a "harder" beat after the skips, that makes me lean toward PVCs, as a PAC or afib wouldn't have a compensatory pause.
I would recommend you go to the cardiologist and get a monitor if you haven't, I'm talking to mine tomorrow about my episode. If it was a short run of NSVT, in a normal heart this is benign, but NSVT in a "normal" heart is rare and some underlying heart disease could be undetected.