PR Interval
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PR Interval
The PR interval has three parts:
1. Depolarization of the right and left atrium
2. Depolarization of the AV node
3. Depolarization of the top portion of the HIS Purkinje System.
The PR interval is measured from beginning of the P wave to onset of the QRS complex.
The normal duration of the PR interval is 0.12 sec to 0.20 seconds.