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Which of the following events is not rec...

Which of the following events is not recorded on the surface ECG?

A

Atrial depolarization

B

Atrial repolarization

C

Ventricular depolarization

D

Ventricular repolarization

Text Solution

AI Generated Solution

The correct Answer is:
To determine which event is not recorded on the surface ECG, we need to analyze the components of the ECG and what they represent in the cardiac cycle. ### Step-by-Step Solution: 1. **Understand the ECG Components**: - The ECG consists of several key components: P wave, QRS complex, and T wave. - Each of these components corresponds to specific electrical events in the heart. 2. **Identify the Events Represented**: - **P Wave**: Represents atrial depolarization (the electrical activity that leads to the contraction of the atria). - **QRS Complex**: Represents ventricular depolarization (the electrical activity that leads to the contraction of the ventricles). - **T Wave**: Represents ventricular repolarization (the process of the ventricles relaxing after contraction). 3. **Consider the Events Not Recorded**: - The question asks for an event that is not recorded on the surface ECG. - While the ECG captures atrial depolarization (P wave), ventricular depolarization (QRS complex), and ventricular repolarization (T wave), it does not record atrial repolarization. 4. **Conclusion**: - Therefore, the event that is not recorded on the surface ECG is **atrial repolarization**. ### Final Answer: The event that is not recorded on the surface ECG is **atrial repolarization**. ---
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