Bradycardia natural history, complications and prognosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: M.Umer Tariq [2]
Overview
Natural History, Complications and Prognosis
Natural History
- Sinus bradycardia occurs in healthy patients as an adaptive response, particularly in well-conditioned persons or while sleeping, but it can also occur as a pathologic response in a variety of conditions.
- Sinus bradycardia itself does not cause symptoms directly, although a patient with comorbid conditions that may be exacerbated by decreased cardiac output (e.g. angina, heart failure) may have worsening symptoms related to comorbidity.
- Slower sinus rates are often very well tolerated. Asymptomatic resting bradycardias, particularly in trained athletes and young individuals are not pathological and doesn't require treatment.
Complications
- Common complications of bradycardia include:[1]
Prognosis
The prognosis is good when the rhythm is quickly identified by the healthcare provider. Nevertheless, people with sick sinus syndrome who have bradycardia appear to have a poor 5-year survival prognosis of 45-70 per cent.[2]