ECG ( electrocardiogram)
In ECG we study the electrical activity of the heart by graphically
electrical activity occurs in the myocardium of the heart
note - revision purpose only 😊
1. atrial depolarization (P wave )
2. AV node stimulation ( PR segment )
3. Interventricular septal depolarization ( Q wave )
4. Major ventricular depolarization (R wave)
5. Basal ventricular depolarization ( S wave )
. complete depolarization ( ST-segment )
6. Ventricular repolarization
GRAPH-
ONE small box duration (0.04 sec.)
one big box = 0.04 Х 5 = 0.2 sec
QT interval duration ( 0.4 sec. )
. Difference b/w AV node and Purkinje fiber
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