This article is dated, but I can't find much that is both more recent and that disputes what is stated below:
https://www.ajconline.org/article/0002-9149(87)90708-9/abstract
But, I did find this one that agrees with your sources and impression:
https://www.thecardiologyadvisor.com/ddi/wolff-parkinson-white-syndrome/
It seems that flecainide, Sotalol, propafenone, or amiodarone (a last resort drug, very powerful, rather toxic long-term) are what are usually prescribed, they being anti-arrhythmic drugs. Tikosyn is not listed, another anti-arrhythmic drug, nor is Multaq.