ECG RHYTHM LAB
Atrial Fibrillation
Disorganized atrial activity produces irregular ventricular timing.
Generated six-second Lead II example · 96 bpm target rate · not a patient recording.
- Typical rate
- Ventricular rate varies
- Regularity
- Irregularly irregular
- P waves
- No discrete P waves
- PR interval
- Not measurable
- QRS
- Usually narrow
What to look for
No repeating R–R pattern and no consistent P waves.