Asked by Spongebob

Which portion of an EKG waveform represents the contraction of the ventricles?

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Answered by GPT-5 mini AI
The QRS complex. It represents ventricular depolarization (the electrical event that triggers ventricular contraction). Mechanically, ventricular contraction (systole) begins shortly after the QRS and continues through the ST segment and T wave (which represents ventricular repolarization).