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In an ECG, the depolarization of atria i...

In an ECG, the depolarization of atria is indicated by

A

P-Wave

B

Q-wave

C

R-wave

D

S-wave

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding which part of the ECG indicates the depolarization of the atria, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the ECG Components**: The electrocardiogram (ECG) consists of several waves, including the P wave, Q wave, R wave, and S wave. Each of these waves corresponds to different electrical activities of the heart. 2. **Identify Atrial Depolarization**: Atrial depolarization refers to the electrical activation of the atria, which leads to their contraction. This is an important part of the cardiac cycle as it helps in pumping blood into the ventricles. 3. **Locate the P Wave**: In the ECG, the P wave specifically represents the depolarization of the atria. It is typically a small positive deflection that occurs before the larger QRS complex, which represents ventricular depolarization. 4. **Differentiate Between Waves**: The QRS complex (which includes the Q wave, R wave, and S wave) represents ventricular depolarization, not atrial depolarization. Therefore, the P wave is the only wave that indicates atrial depolarization. 5. **Conclusion**: Based on the information gathered, we conclude that the correct answer to the question is the P wave, as it is the wave that indicates the depolarization of the atria in an ECG. ### Final Answer: In an ECG, the depolarization of the atria is indicated by the **P wave**. ---
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