First slide

Circulatory Pathways

Question

QRS complex in ECG represents

Easy

A

atrial depolarisation
B

ventricular diastole
C

ventricular depolarisation
D

ventricular repolarisation

Solution

The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction. The contraction starts shortly after Q and marks the beginning of the systole.

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