bundle branch block EKG findings

• related: Cardiology
• source:
• tags: #literature #cardiology

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• WilLiam MoRrow

RBBB

• RSR in V1
• slurred S in lateral leads
• sometimes T wave inversion in precordial leads, appropriate discordance
• incomplete RBBB: RSR in V1 but QRS < 120
• M shape, then W shape

LBBB

• Large S in V1; QS in V1 or rS (W shape)
• Large R in lateral leads
• Notched V6 (M)
• W shape in V1, M shape in V6

¹

Alternating

• alternating LBBB and RBBB²

Links to this note

• Cardiology

  • bundle branch block EKG findings

• EKG basics

  • related: Cardiology, bundle branch block EKG findings, ECG samples

• Brugada syndrome

  • related: Cardiology, EKG basics, bundle branch block EKG findings

• STEMI criteria

  • OR new LBBB (bundle branch block EKG findings)

Footnotes

1. https://litfl.com/right-bundle-branch-block-rbbb-ecg-library/ ↩

2. CHEST Board Review Critical Care? ↩