ECG library
First-degree AV block
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
- PR above 200 ms
- Every P still conducts
Learning points
- Measure PR with the calipers: more than one large box (200 ms) is prolonged.
- Check the medication list: AV nodal blockers are the everyday cause.
Connected