Sinus Exit Block - Sinus Rhythm.
- Sinus Exit Block looks very much the same as Sinus Arrest with one important distinction.
- The duration of the pause with Sinus Exit Block is in a direct multiple of the R to R interval of the underlying rhythm. Sinus Arrest does not have this specific feature.
Analyze this tracing using the five steps of rhythm analysis.
- Rhythm: Irregular
- Rate: 40 bpm
- P wave: upright and uniform
- PR interval: 0.16 sec
- QRS: 0.10 sec
- Interpretation: Sinus Exit Block