In ECG, QRS wave represents:
Correct answer: A. Ventricular systole
- A. Ventricular systole
- B. Atrial systole
- C. Diastole
- D. Recovery systole
Explanation
The QRS complex represents depolarization of the ventricles and is followed by ventricular contraction which is collectively known as the ventricular systole.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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About Cardiac Cycle and Heartbeat
The cardiac cycle describes atrial systole, ventricular systole and diastole, including pressure changes, blood movement and the opening or closing of heart valves. It also covers the conduction pathway from the sinoatrial node through the atrioventricular node, bundle of His and Purkinje fibres, and relates these events to heartbeat sounds.
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