The document provides an introduction to ECG (electrocardiogram), detailing its function in recording the heart's electrical activity and diagnosing irregularities. It explains the types of leads used in ECG, including unipolar and bipolar leads, and outlines the configuration of bipolar limb leads and the Einthoven law. Additionally, it mentions augmented leads and their graphical representation.

1. ECG LEADS
GROUP:A
KU-BMCTH PBL

2. INTRODUCTION TO ECG
ECG (ELECTRO CARDIOGRAM)
 Record electrical activity of Heart.
 Used to test irregularities of the Heart functions.
 Conducted by placing skin electrodes on different parts of the body.

3. ECG Leads:
 “lead” refer to a combination of positive and negative electrode which helps
to view electrical activity of heart in the form of wave in ECG paper.
 To record ECG 12 different leads are placed on the body
Types of lead
 Unipolar: positive electrode are active but negative electrodes are at zero
potential.
 Bipolar: both negative and positive electrode are active.

7. Bipolar limb leads
 Electrical connections between patients limbs and electrocardiograph by
using positive and negative electrode.
 There are three bipolar limb leads:
 Lead I
 Lead II
 Lead III

8. Einthoven law
Lead I potential + lead III potential = lead II potential

9. CHEST LEADS

10. Graphical representation of chest lead

11. Augmented leads:
Graphical representation

12. THANK YOU