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I'm 18 and have been experiencing tachycardia at random times as well as the occasional ectopic beat. My cardiologist gave me a 7 day holter monitor. He said that my heart was healthy but the only problem is that I get sinus tachycardia at times, and so he prescribed me 1.25mg of bisoprolol. He also said during that week my heartrate ranged from about 48bpm to 160bpm. My heartrate is fairly slow during rest i.e. about 60bpm. Thus, surely if I'll be taking betablockers my heartrate will drop to a dangerously slow rate? Especially if my heartrate is 48 during sleep without taking any betablockers!? Basically I'm concerned that my heart will be beating too slowly, and do beta blockers impact exercise in anyway? I enjoy cycling and would be absolutely gutted if I can no longer exercise
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