These three medications are less likely to cause
side effects and more likely to prevent SVT. However, rarely in SVT patients, such medications will cause a cardiac arrest. Estimates of this risk are in the 1% range, but many physicians consider this to be too high of an estimate. I tried sotalol briefly, but had a very bad SVT episode that was difficult to convert, so I stopped it immediately, and went back to metoprolol.
Trying all of the different drugs and dosages carries some risk.