ECG library
Normal sinus rhythm
intro25 mm/s · 10 mm/mV · synthetic tracing
100%
Calipers:2000 ms50.0 small boxes30 bpm if R-RDrag the orange markers. One small box = 40 ms.
Key findings
- Upright P in II before every QRS
- Narrow QRS
- Isoelectric ST segments
Learning points
- Learn one normal deeply; every abnormal ECG is read against it.
- aVR looks 'inverted' by design: it watches the heart from the right shoulder.
Connected