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Conduction Disorders
 
 

Third Degree SA Exit Block

February 15th, 2021
 
 
 
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Overview

In third degree sinoatrial exit block, there is complete failure of transmission to the atria - this is indistinguishable from sinus arrest on ECG.
  • Look For

  • Complete lack of P waves and QRS complexes
  • An escape rhythm may be present
  •  
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