It’s been 2 months since I had an SVT episode—the 8th of February. And 30th January before that are the only two this year. I think I can now say that the daily Bisoprolol beta blocker I started taking about a year ago works.
See the links in this previous post for more info about SVT and a hack to stop the episodes that works for me: https://mastodon.social/@ianRobinson/110251779905694078