In E.C.G QRS complex represent:
Correct answer: C. Ventricle systole
- A. Atrial systole
- B. Atrial diastole
- C. Ventricle systole
- D. Ventricle diastole
Explanation
The second part of ECG is the QRS complex which features a small drop in voltage (Q) a large voltage peak ( R ) and another small drop in voltage (S). The QRS complex corresponds to the depolarization of the ventricle during ventricle systole.
This question appeared on the ETEA MDCAT 2018 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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