Isovolumetric contraction appears on the ECG as part of the QRS complex.

Question

Quizplus · Accepted Answer

Isovolumetric contraction does not appear on the ECG as it refers to the period in the cardiac cycle where the ventricles are contracting but the volume of blood is not changing, and this does not produce any electrical activity that can be detected by the ECG. The QRS complex represents the depolarization of the ventricles, which precedes the beginning of the isovolumetric contraction.

Isovolumetric Contraction Appears on the ECG as Part of the QRS