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Atrial Flutter with Variable Block

February 15th, 2021


Atrial flutter is typically a regular, narrow complex tachycardia with 2:1 or even higher levels of AV block. In some patients the AV block is variable; this may be either idiopathic or in the context of complete heart block.
  • Look For

  • Irregular rhythm
  • Saw-toothed baseline 'flutter' waves at ~300bpm
  • Variable atrioventricular block (inconsistent number of flutter waves between QRS complexes)
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