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Sinus bradycardia

Authoring team

Causes:

  • congenital
  • hypothyroidism
  • hypothermia
  • post myocardial infarct
  • raised intra-cranial pressure
  • drugs eg beta-blockers, digitalis, hypotensives
  • rapid rise in blood pressure
  • sinoatrial disease ('sick sinus syndrome')
  • transient increase in vagal tone eg after vomiting
  • physical training
  • convalescence from fever
  • hypersensitive carotid sinus syndrome
  • neurocardiogenic syndrome
  • jaundice

Click here for an example ECG and further information concerning sinus bradycardia

Reference:

  • Shaw DB. Bradycardia, sinus node disease, sino-atrial dysfunction and heart block.Medicine International, 21 (11), 446-52.

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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