Probably stuff people here already know, but nice to see it getting a bit more attention. I've always thought it seemed related, especially in those of us with constant tachycardia that's treatment resistant, etc. Doesn't sound like they know much more, though - but at least covering in a mainstream publication.
https://www.theguardian.com/society...-the-vagus-nerve-is-so-exciting-to-scientists
https://www.theguardian.com/society...-the-vagus-nerve-is-so-exciting-to-scientists