Recognition
- • Rate 60–100
- • Regular sinus rhythm
- • P before every QRS
- • PR 120–200 ms
- • QRS <120 ms
- • QTc <440 ms
Key findings
- • Upright P in II
- • Inverted P in aVR
- • Normal axis (-30° to +90°)
Clinical importance
- • Baseline for comparison
- • Identifies normal variants (early repolarisation, juvenile T inversion)
Management pearls
- • No intervention if asymptomatic
