I have no personal experience with SVT, but I have years of experience with Propafenone, Rythmol, Metoprolol,
and a
Calcium Channel blockers. All of them, will also lower your blood pressure
and that can be a problem, but I have found as long as I keep the Beta Blocker at or below 100 mg a day my BP is normal, to low normal. I do, however, believe the BB causes me some fatigue and lack of energy.