What are causes of bradycardia?

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What are causes of bradycardia?

Bradycardia can be caused by:

  • A problem with your SA node (sick sinus syndrome)
  • A problem with your AV node or any of the electrical pathways through the heart (heart block)
  • Illness or medical problems such as:
    • Injury to the heart due to heart attack, endocarditis or a medical procedure
    • Inflammation of the heart muscle
    • Low thyroid function
    • Electrolyte imbalance in the blood
    • Sleep apnea
    • Congenital heart defect
    • Valvular heart disease
    • Lyme disease
  • Certain medications, including beta blockers and heart rhythm medications

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