Why is my Resting Heart Rate Going up on Bisoprolol?

[Aubergine15]

Following wearing a Zio Heart Monitor for 10m days my GP believes I have SVT and have been referred to Cardiology for tests. I have been put on Bisoprolol which has been increased to 10mg. Initially my resting heart rate goes down but as my body gets used the new dose it starts to go up again. I can't find any information on this happening to anyone. I can't increase the dosage because my blood pressure was normal when I started this treatment in October but now it is getting very low. Has anyone any experience of this and does anyone know what might be happening? I no longer get a really high heart rate but during 24 hrs I'm stuck in the 85 - 112 bpm zone. My RHR used to be around 65.

[Eewee]

I have had a similar issue post valve surgery where my heart rate rose to 120 fixed and didn’t respond to Bisoprolol. My cardiologist used the term not responding to Bisoprolol and identified Atrial tachycardia. It appears that bisoprolol doesn’t help in this case. I was given a cardio version which immediately corrected it and have been recommended an ablation if it returns. I would very much recommend pushing for more information and an ecg. Very best wishes.

[Aubergine15 in reply to Eewee]

Thanks for that. I'm waiting to see what the cardiologist says now.

[Alixia]

I was put on bisoprolol to help reduce atrial fibrillation and ectopic beats. It actually increased them, and made me feel faint, so I asked to be taken off it. I was given an ablation instead which has so far worked.

[Aubergine15 in reply to Alixia]

Thanks for that. It's the underlying cause that worries me. I want to know why this is happening to me.

[DoggieMum]

Four years ago I was on 1.25 mg but, as you say, as your body gets used to it, the dose is increased. I'm on 7.5mg at the moment and on the waiting list to see a cardiologist

[Aubergine15 in reply to DoggieMum]

Yes, what worries me is that 10mg seems quite a lot but my RHR is going up again and the Valsalva Maneuver doesn't seem to work anymore.

[alvariam]

I was put on 2.5mg Bisoprolol about 9 months ago after being diagnosed with AF, later reduced to 1.25 mg because hr went too low. Heart rate remained at a satisfactory level, but I had a bad attack of asthma just recently with really low blood oxygen levels and was in hospital for 12 days. I have never had asthma before and I was told by doctors that Bisoprolol was probably a cause of the asthma.

[Aubergine15]

Thanks for that. I have underlying asthma so I'm a bit worried about some of the possible treatments.