12-Lead ECG Basics

A video designed to create a foundation of understanding of the 12-lead ECG in pre-health profession freshman and sophomore students. This video should not be considered clinically relevant, rather I hope it serves as a basis for understanding the biophysics of ECG recordings so that the interested student can use it to further develop their understanding of ECGs. Simplifications, such as where atrial repolarization is detected are used in hopes that a minor sacrifice in technical accuracy facilitates a greater increase in overall understanding. Discussion of the validity of that sacrifice are welcome in the comments and will not be altered or censored. Relevant topics covered will be an introduction, possible diagnoses, cardiac conduction cycle, Einthoven's triangle, how ECG leads detect the voltage changes in the conduction cycle, a basic understanding of leads I, II, and III, augmented leads, QRS axis, precordial leads, and a return to diagnoses using http://www.ecglibrary.com.

Category:

Education

Tags:

• 12-Lead
• ECG
• Basic
• Introduction
• ecglibrary
• EKG
• Einthoven's
• QRS
• axis

[sheoran01]

Thanks a lot loved the video...

[Rexxxon]

This is great vid!

But please try to write a bit larger next time. :D

[rrroddy002]

I'm a medical student and I just have to say thank you for taking the time to make this video and share! It was immensely helpful as a simple basis for the understanding of ECGs..... much appreciated!

[doczak69]

Excellent video, really helped me to get a grip on ECG,being trying hard to learn it form books but your video made it simple to understand it. Your presentation skills are awesome!!! many thanks :)

[hennagerdj]

@Peace722 Please do keep in mind that this is a bit of an oversimplification. But, what I am trying to say is that the voltage of repolarization is in the opposite direction of the lead. Thus, the trace will move downward; as in the voltage will return to baseline as you come down the p-wave.

[Peace722]

When you said over simplifying, a part of me died inside.

[yanalalhasan1]

The guy who made the video is very smart. In my uni, doctors who've taught med students for many years could not explain as well as he does . When I reached minute 22, I realized that the P wave shows up clearest with highest voltage specifically at lead 2, being parallel to it. Thank you, that really helped.