# PR interval

> the period, measured in milliseconds, that extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS complex (the onset of ventricular depolarization)

**Wikidata**: [Q3800650](https://www.wikidata.org/wiki/Q3800650)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/PR_interval)  
**Source**: https://4ort.xyz/entity/pr-interval


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)