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- Subject
- Biology Mcqsbiology-mcqs
- Published
- 23 May 2018
- Last updated
- 28 May 2026
Explanation
The QRS complex corresponds to the phase when the ventricles contract, known as ventricular systole. Atrial systole and diastole, as well as ventricular diastole, occur at different points in the cardiac cycle and are represented by other parts of the ECG.
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