basics of ECG in a funny way

3. the record of the electrical activity of the heart

4. BRAIN(EEG)

5. • Muscle (EMG)

6. The principle of ECG

9. • ECG does not record the mechanical
contraction of the heart

10. Normal ECG

11. Why some waves are
Positive and others are negative?
It depends on :
• the type of the wave (depolarization or
repolarization)
• the direction of the wave

12. Wave of depolarization

14. Wave of repolarizationWave of repolarization

15. Electrodes and Leads

16. Recording Electrodes9

17. 12 Leads

18. • Why many electrodes and leads?

23. leads
bipolar
1 2 3
unipolar
limb
a VR A VL A VF
chest
V1-V6

24. Bipolar leads

25. Bipolar leads

28. Unipolar limb leads

29. Unipolar chest leads

30. coronal transverse

33. The ECG WAVES

34. • Slow ventricular repolarization

35. • Atrial deplarization
• Conduction through AV node and AV
bundle

36. • Ventricular contaction

37. 1-ECG Interpretation Made Incredibly Easy! (5th
edition)
2-Clinical Physiology Made Ridiculously Simple
3-Guyton