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Title: EKG
Description: this file contains a full explanation of the hurt function and several EKG (normal and abnormal ones ) + explaining the deference between them and the causes
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ELECTROCARDIOGRAM

2

Normal Impulse Conduction
Sinoatrial node
AV node

Bundle of His
Bundle Branches
Purkinje fibers
3

Cardiac cycle
•
•
•
•

Atrial systole (contraction=depolarisation) LA/RA
Ventricular systole (contraction=depolarisation) LV/RV
Atrial diastole (relaxation=repolarisation) LA/RA
Ventricular diastole (relaxation=repolarisation) LV/RV

4

The “PQRST” complex
R
T

P

Q S

5

The “PQRST”
• P wave - Atrial
depolarization

• QRS - Ventricular
depolarization
• T wave - Ventricular
repolarization
Atrial repolarization is not seen on surface EKG, since it occurs
during ventricular systole (lost within QRS)
Raffy Karaminassian M
...
D

10

Standard (peripheral/ limb) leads: I-II-III-aVR-aVL-aVF

11

The precordial (frontal) leads: V1-V2-V3-V4-V5-V6

Raffy Karaminassian M
...


23

ATRIAL FIBRILLATION

24

ATRIAL FLUTTER

25

SUPRAVENTRICULAR TACHYCARDIA

26

VENTRICULAR TACHYCARDIA

27

LEFT BUNDLE BRANCH BLOCK

28

RIGHT BUNDLE BRANCH BLOCK

29

VENTRICULAR FIBRILLATION

30

ASYSTOLE

31

Title: EKG
Description: this file contains a full explanation of the hurt function and several EKG (normal and abnormal ones ) + explaining the deference between them and the causes
Buy These NotesPreview