However, in general calcium channel blockers and beta-blockers are preferred to
digoxin.
Digoxin has been around for a long time! I used Digoxin over 50 years ago for my PSVT, and my recollection was that it did little to prevent episodes. There are so many newer drugs now that are far more effective. My basic understanding of Digoxin is that it works on the heart's electrical system and decreases the heart rate, but increases each stroke volume.