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Anatomy of the ECG/ EKG & 5-Step method of Interpretation

P-wave: Atrial Depolarization/ Contraction of the Atria

PR-interval: The time from the beginning of the P wave to the beginning of the QRS complex.

QRS: Ventricular Depolarization/ Contraction of the Ventricles

T-wave: Ventricular Repolorization

5-Step method of Interpreting a Basic ECG/EKG:

  1. Rate?

  • Normal (60-100)

  • Bradycardia (<60)

  • Tachycardia ( >100)

2. Rhythm?

  • Regular (R-R distances constant)

  • Irregular (R-R distances varies)

3. Are there P-waves?

  • One P-wave for every QRS?

  • 1:1 conduction?

4. PR Interval ?

  • Normal= 0.12- 0.20 seconds

  • 3-5 small boxes

5. QRS normal or wide?

  • Normal= ≤ 0.12 seconds

  • ≤ 3 small boxes

Disclaimer: This video/post is for educational purposes and is not intended as medical advice. While we strive for 100% accuracy, errors may occur, and medications or protocols may change over time.


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