Cardiovascular | ECG Basics

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Ninja Nerds!
In this foundational cardiovascular physiology lecture, Professor Zach Murphy introduces the basics of ECG (EKG) interpretation, providing the essential building blocks for understanding how to analyze a 12-lead ECG. This session is perfect for students just starting out or anyone looking to strengthen their grasp of cardiac electrophysiology.

We begin by reviewing the components of the ECG waveform—including the P wave, QRS complex, ST segment, and T wave—and explain what each represents in terms of cardiac depolarization and repolarization. You’ll also learn about lead placement, the standard 12-lead setup, and how different leads correspond to different anatomical regions of the heart.

This lecture lays the groundwork for recognizing normal intervals, heart rate, and rhythm, serving as a stepping stone for more advanced ECG topics like arrhythmias, ischemia, and conduction blocks.

📌 UPDATED ECG Basics Lecture →    • ECG Basics | How to Read & Interpret ECGs:...  
We highly recommend watching this newer version for the most up-to-date visuals, clinical examples, and improved teaching flow.

Enjoy the lecture and support us below!

Table of Contents:
00:00 Lab
00:44 Cardiac Conduction System
01:47 Positive Deflection
03:00 Negative Deflection
04:52 EKG Lead II Example
05:12 P-Wave
08:07 PR Interval
11:00 Q-Wave
14:36 R-Wave
19:32 S-Wave
22:09 ST Segment
23:50 T-Wave
27:11 EKG Leads: Types
30:09 Bi-Polar Limb Leads (Leads I, II, III)
37:05 Augmented Uni-Polar Limb Leads (aVL, aVR, aVF)
42:45 EKG Chest Lead Placement
46:27 Reporting Locations
50:26 Comment, Like SUBSCRIBE!

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