Left anterior fascicular block: Difference between revisions
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==Criteria==
==Criteria==
Diagnostic criteria include<ref>Surawicz B, Knilans T. Chou’s Electrocardiography in Clinical Practice (6th edition), Saunders 2008.</ref>:
Diagnostic criteria include<ref>Surawicz B, Knilans T. Chou’s Electrocardiography in Clinical Practice (6th edition), Saunders 2008.</ref>:
#Left axis deviation (-45 or more)
*Left axis deviation (-45 or more)
#QRS 80-110ms
*QRS 80-110ms
#rS in II, III, and AVF
*rS in II, III, and AVF
#qR in I and aVL
*qR in I and aVL
#Increased QRS voltage in the limb leads
*Increased QRS voltage in the limb leads


==Significance==
==Significance==

Revision as of 17:40, 23 June 2016

His-Purkinje system and hemiblocks

Criteria

Diagnostic criteria include[1]:

  • Left axis deviation (-45 or more)
  • QRS 80-110ms
  • rS in II, III, and AVF
  • qR in I and aVL
  • Increased QRS voltage in the limb leads

Significance

  • Considered benign finding
  • LAFB may increase risk of AF, CHF, and death[2]

See Also

External Links

References

  1. ↑ Surawicz B, Knilans T. Chou’s Electrocardiography in Clinical Practice (6th edition), Saunders 2008.
  2. ↑ Mandyam MC, et al. Long-term outcomes of left anterior fascicular block in the absence of overt cardiovascular disease. JAMA. 2013; 309(15):1587-1588.
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