Difference between revisions of "Sinus Bradycardia"

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Revision as of 21:34, 12 January 2010

This is part of: Sinus node rhythms and arrhythmias
Atrial rate < 60 bpm
Ventricular rate same
Regularity regular
Origin sinus node
P-wave normal
Effect of adenosine slows down
Example ECG: Sinusbradycardia of around 40 bpm.Sinusbradycardia
Example ECG2:

In sinusbradycardia the sinus node fires at a slow (<60 bpm) rate. Causes of sinusbradycardia include:

  • normal physiology in an athelete
  • medication (beta-blockers)
  • ischemia (typically inferior myocardial infarction with involvement of the sinus node artery)
  • hypothermia
  • hypothyroidism.