Final answer:
The R wave within the QRS complex on the ECG indicates depolarization of the ventricles, including the lateral walls, necessary for ventricular contraction.
Step-by-step explanation:
The wave on the ECG that is representative of the depolarization of the lateral walls of the ventricles is part of the QRS complex. Specifically, the R wave within the QRS complex indicates the peak of ventricular depolarization, which includes the lateral walls. The QRS complex signifies the spread of the depolarization wave through the ventricles, which is necessary for them to contract and pump blood through the body.
The depolarization of the lateral walls of the heart is primarily represented by the Q, R, and S waves collectively known as the QRS complex on the electrocardiogram (ECG). In this context:
A. Q wave: The initial negative deflection before the R wave, often associated with septal depolarization.
B. R wave: The positive deflection in the QRS complex, representing the depolarization of the ventricles, including the lateral walls.
C. S wave: The negative deflection following the R wave, indicating the completion of ventricular depolarization.
D. T wave: Represents ventricular repolarization, not depolarization, and is unrelated to the lateral walls.