- Description/Definition
- Pathology
- Pathophysiology
- Epidemiology
- Management & Treatment
- Prevention
- Complications
- Prognosis
- Research Frontier
- Clinical Case Studies
- Study Questions
Sinus bradycardia is defined as a sinus rate < 60 bpm.
In most instances sinus bradycardia is a benign arrhythmia.
In healthy young adults and trained athletes, resting sinus bradycardia may be a normal phenomenon caused by increased vagal tone.
Sinus bradycardia during sleep in elderly individuals is common.
Inability to increase sinus rates adequately during exercise is considered abnormal . Sinus bradycardia < 40 bpm (not associated with sleep or physical conditioning) is generally considered abnormal. Correlation of symptoms with sinus bradycardia is critical in the evaluation of these patients.
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