Difference between revisions of "Left bundle branch block"

(Evaluation)
 
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**Large and wide R waves — leads I, aVL, V5, and V6
 
**Large and wide R waves — leads I, aVL, V5, and V6
 
**Small R wave followed by deep S wave —leads II, III, aVF, V1–V3
 
**Small R wave followed by deep S wave —leads II, III, aVF, V1–V3
[[File:LBBB.jpg|thumb|center|500px|LBBB]]
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[[File:LBBB.jpg|thumb|LBBB]]
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 +
==Differential Diagnosis==
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{{Tachycardia (wide) DDX}}
  
 
==See Also==
 
==See Also==

Latest revision as of 06:35, 5 April 2019

Evaluation

Bundle Branch Block.png
  • ST Depression and T wave inversion are common
  • QRS > 0.12 in limb leads
  • Leads
    • Large and wide R waves — leads I, aVL, V5, and V6
    • Small R wave followed by deep S wave —leads II, III, aVF, V1–V3
LBBB

Differential Diagnosis

Wide-complex tachycardia

Assume any wide-complex tachycardia is ventricular tachycardia until proven otherwise (it is safer to incorrectly assume a ventricular dysrhythmia than supraventricular tachycardia with abberancy)

^Fixed or rate-related

See Also

References

  • Journal of Electrocardiology. Vol 43 (2010). 40-42.