Recognition
- • QRS ≥120 ms
- • RSR' (M-shape) in V1–V2
- • Slurred S in I, V5–V6
- • T-wave inversion V1–V3
Key findings
- • Right axis if old MI / cor pulmonale
Clinical importance
- • May be benign in young
- • Acute new RBBB: think PE, MI
Management pearls
- • Investigate cause if new
- • No treatment if isolated and asymptomatic
