A 41-year-old female asked:
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is sinus bradycardia always a sign of an underlying health issue?

2 doctor answers
Dr. Bennett Werner
43 years experience Cardiology
Absolutely not!: Virtually all seasoned athletes have sinus bradycardia. Many normal, healthy non-athletes do as well. Virtually everybody has SB at sometime during sleep.
Answered on Feb 17, 2018
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Dr. David Houghton
Specializes in Internal Medicine and Pediatrics
Usually not: As long as sinus bradycardia doesn't cause symptoms like dizziness, then it's not a problem. Well-trained athletes can have impressive sinus bradycardia because their hearts in such good shape, they don't need to beat as fast as the rest of ours. Rarely sinus bradycardia can be caused by critical illness, but in those cases the severity of illness is obvious.
Answered on Feb 17, 2018
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