Exam-style question
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What is the significance of the PR interval in an ECG?.
- A.Time taken for atrial depolarization
- B.Time taken for ventricular depolarization
- C.Time taken for electrical impulse to travel from atria to ventricles
- D.Time taken for ventricular repolarization
Model answer
What a good answer should say
- Time taken for electrical impulse to travel from atria to ventricles
Explanation
Why this works
The PR interval represents the time taken for the electrical impulse to travel from the atria through the AV node to the ventricles, indicating the delay before ventricular contraction.
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