ECG physiology Recording of normal human ecg ecg leads ecg electrodes

1. To record Normal
Human ECG by Using
Bipolar & Unipolar
Chest Leads
Dr. Irtaza Rehman
Author of the book “The Extraordinary Life”

3. Life lesson

10. Electrodes
Vs
Leads

16. Speeeeeeeddd

19. What is the Speed??

20. Lets Revise
• 1 small box (1 mm) is _______ sec at 50 mm/s.
• 1 small box ( 1mm) is _______ sec at 25 mm/s.
• 1 large box (5 mm) is _______ sec at 50 mm/s.
• 1 large box (5 mm) is _______ sec at 25 mm/s.

21. All ECG leads
analyze the
same electrical
events but from
different angles

22. This means that ECG
leads with similar
angles must display
similar ECG curves

23. More Electrodes = More
Leads = More
Sensitivity = Less
Specificity = Less
Feasibility

24. Game of Planes

26. Bipolar Limb Leads

32. Augmented unipolar limb leads

36. Anatomical aspects of the limb leads
• II, aVF and III: are called inferior limb
leads and they primarily observe the inferior
aspect of the left ventricle.
• aVL, I and -aVR: are called lateral limb
leads and they primarily observe the lateral
aspect of the left ventricle.

37. Chest Leads (Precordial Leads)

41. Anatomical aspects of the chest
leads

50. Jazakumullahu
Khair ♥
(May ALLAH swt reward
you with goodness)