Which of the following waves of ECG shows ventricular depolarization

Options

A. P wave
B. QRS wave
C. T wave
D. U wave

Answer

To determine which wave of the ECG shows ventricular depolarization, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding ECG**:
- The electrocardiogram (ECG) is a graphical representation of the electrical activity of the heart. It is recorded using electrodes placed on the skin.

2. **Identifying the Waves**:
- The ECG consists of several waves, primarily labeled as P, QRS, and T waves. Each wave corresponds to specific electrical events in the heart.

3. **P Wave**:
- The P wave represents atrial depolarization. This is the electrical activity that triggers the contraction of the atria (the upper chambers of the heart).

4. **QRS Complex**:
- The QRS complex represents ventricular depolarization. This is the electrical activity that triggers the contraction of the ventricles (the lower chambers of the heart). It is characterized by a rapid series of deflections.

5. **T Wave**:
- The T wave represents ventricular repolarization, which is the process of the ventricles recovering after contraction.

6. **Conclusion**:
- Based on the definitions and functions of these waves, the QRS complex is the wave that shows ventricular depolarization.

### Final Answer:
The wave of the ECG that shows ventricular depolarization is the **QRS complex**.

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