Left bundle branch block

Diagnosis

• ST Depression and TWI 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

See Also

• ECG (Main)
• Sgarbossa's Criteria
• STEMI equivalents

Source

• Adapted from Niemann, Lampe, Pani, Donaldson, ECGpedia.org
• Journal of Electrocardiology. Vol 43 (2010). 40-42.