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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Low Pulse Rate While On Atenolol?

I have been taking Atenolol for the last two years. I have lost weight and my doctor has been reducing my dosage since my pulse was getting too slow and irregular. Currently I have been taking 12.5mg in the morning for the last 5 days but this afternoon my pulse shot up to 130 and with deep-breathing and biofeedback I could only get it down to 100-110 resting. Could this be rebound tachycardia 5 days after a reduction in dosage? We have been titrating down from 50mg daily in a divided dose (25am and 25 at hs) over the last two months.
Wed, 13 Jun 2018
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General & Family Physician,  's  Response
Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.

I don't know much about your medical history, but I suggest you to do an ECG to see the heart rhythm and possibly a 24-48 hr ECG Holter monitoring, and a cardiac sonography. After doing these, the doctor would be able to decide if it's a rebound tachycardia or something else. I suggest you to get another Atenolol dosage in case of high heart rate, like in your case of increased heart rate up to 130.

All the best!
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What Causes Low Pulse Rate While On Atenolol?

Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. I don t know much about your medical history, but I suggest you to do an ECG to see the heart rhythm and possibly a 24-48 hr ECG Holter monitoring, and a cardiac sonography. After doing these, the doctor would be able to decide if it s a rebound tachycardia or something else. I suggest you to get another Atenolol dosage in case of high heart rate, like in your case of increased heart rate up to 130. All the best!