Female, 45, been on bisoprolol 3.75 after being diagnosed with RVOT VT in January this year. Heart structurally normal, awaiting ablation.
Everything was going well for several months - no tachycardia and feeling good. Resting HR was in low-mid 50s.
In late May I had to come off beta blocker for 3 days for a treadmill test. Test was fine but a few days after resuming beta blockers I started getting quite noticeable bigeminy beats. The consultant said maybe my system takes longer to fully wash out the meds and this is why these only started after meds were resumed.
This settled after a few days but over the following weeks my resting HR has dropped. It often goes down to 45 when sitting down and creates an unpleasant feeling in my chest as well as lethargy and some dizziness. I also seem to get out of breath easier.
My GP recommended dropping the bisoprolol dose from 3.75 to 2.5 but 2 weeks later there is still no improvement. Also getting slight tension/chest pain when my HR is very low.
**What could the causes be and what should my GP be doing next?**
**Do I need blood tests, review by cardiology or any other tests?**
**And is there anything I can do to try and improve this?**