The time taken by the impulse to travel through atria, AV node, and the rest of conducting tissue is

Options

A. PQ interval
B. PQRS interval
C. QRS interval
D. ST segment

Answer

To determine the time taken by the impulse to travel through the atria, AV node, and the rest of the conducting tissue, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Cardiac Cycle**: The heart's electrical conduction system initiates impulses that cause the heart to contract. The impulse starts at the SA node, travels through the atria, and then reaches the AV node.

2. **Identifying the P Wave**: The P wave on an electrocardiogram (ECG) represents atrial depolarization. This is the phase where the atria contract to push blood into the ventricles.

3. **Identifying the PQ Interval**: The time taken for the impulse to travel from the SA node through the atria, AV node, and into the ventricles is represented by the PQ interval (also known as the PR interval).

4. **Duration of the PQ Interval**: According to standard physiological data, the PQ interval typically lasts between 0.12 to 0.20 seconds. This indicates the time taken for the electrical impulse to travel through the atria and the AV node.

5. **Conclusion**: Therefore, the time taken by the impulse to travel through the atria, AV node, and the rest of the conducting tissue is approximately 0.12 to 0.20 seconds.

### Final Answer:
The time taken by the impulse to travel through the atria, AV node, and the rest of the conducting tissue is 0.12 to 0.20 seconds.