Bradycardia: Your heart rate is definitely on the low side, and in my experience, very few people tolerate any lower than 45 bpm without feeling lightheaded/faint/fainting. I presume your resting HR is greater than 46 when not on a beta blocker? There certainly are other drugs such as flecainide and others that a good internist or cardiologist could start you on for control of abnormal atrial rhythms.
Answered 9/13/2020
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