1. EE 4BD4 Lecture 7 Recording Biopotential Fields

2. Need for Amplifiers 2

3. 3 Sources of 60 Hz

4. 4 Effects of Electrode Impedance Mismatch

5. 5 Mismatch Cont’d and Motion Artifact

6. 6 Effects of Electrode Spacing

7. 7 Common Mode Electrophysiological Signals (cont’d) Effect of Electrode Orientation to Generator

8. 8 Instrumentation in Cardiology The major cellular components of the heart are:  working muscle of the atria & ventricles  specialized conduction cells  pacemaker cells

9. 9 ECG measurement and analysis (cont.): Analysis of the heart vector is achieved by considering the geometry of the standard leads and the corresponding lead vectors.

10. 10 Recorded ECG Signal

11. 11 Effects of Electrode Size