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Diagnostic Criteria for LAFB

  •  LAD (usually -45 to - 90 degrees) 
  • Small Q waves with tall R waves (qR complexes) in leads I and aVL
  • Small R waves with deep S waves (rS complexes) in leads II, III, aVF
     
  • QRS duration normal or slightly prolonged (80-110 ms)
  • Prolonged R wave peak time in aVL > 45 ms
  • Increased QRS voltage in the limb leads

 

LAFB4.jpg

 

prolonged-RWPT-aVL.jpg

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    醫學筆記匯整 ED Notes

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