I had increasingly worse SVT symptoms and had ablations July 2025 and February 2026. Flecainide and metroprolol made symptoms worse, causing bradycardia and tachycardia with long pauses, so I stopped them and felt much better. Third ablation in March was extensive but it really helped. I'm trying to build back my strength though it's a slow process. Still have some mild symptoms. I highly recommend vagal maneuvers.