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The Anatomy of the ECG/ EKG & 5-Step method of interpreting a Basic ECG/ EKG

Updated: Feb 19, 2023


This is the second lesson in our Basic ECG/ EKG series.


In this video, we review the Anatomy of the ECG/ EKG and the 5-Step method of interpreting a Basic ECG/ EKG.


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 is for educational purposes only 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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