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Lightheadedness
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Lightheadedness

I recently posted a question about NSVT, but forgot to mention this.

Sometimes when I laugh, talk a lot or get angry and yell, I get lightheaded. It lasts for a few seconds only

Since I had an episode of NSVT show up on an event monitor [I had 2 monitors done and NSVT was found 1 time] how likely is it that VT is the cause for me getting lightheaded while laughing/talking/yelling?

And it it isn't due to an arrhythmia, do you have any idea what it could be?

Thank you!
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Adrenaline can drive ventricular ectopy, so it could be that you are having either PVCs (extra heart beats) or short runs of NSVT when you get worked up. I doubt you are having sustained VT, but the only way to know this for sure is to do another monitor.
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