Question

On an ECG tracing, the period of time from the start of ventricular depolarization to the end

of ventricular repolarization is the:

Answer 1

The period of time from the start of ventricular depolarization to the end of ventricular repolarization on an ECG tracing is called ventricular systole, which represents the contraction of the ventricles.

Step-by-step explanation:

The period of time from the start of ventricular depolarization to the end of ventricular repolarization on an ECG tracing is the ventricular systole.

During ventricular systole, the ventricles contract and blood is pumped out of the heart to the rest of the body. This is represented by the QRS complex on the ECG. Ventricular systole lasts for approximately 270 ms.

It is important to note that the entire cardiac cycle includes both systole and diastole, and the ECG tracing provides a visual representation of the electrical activity of the heart during this cycle.