RhythmDockECG RHYTHM LAB
Normal Sinus Rhythm
A regular rhythm originating in the sinus node.
Generated six-second Lead II example · 72 bpm target rate · not a patient recording.
- Typical rate
- 60–100 bpm
- Regularity
- Regular
- P waves
- Upright; one before each QRS
- PR interval
- 120–200 ms; constant
- QRS
- Narrow, <120 ms
What to look for
Find an upright P before every narrow QRS, with a constant PR interval.