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Cardiac Subspecialty Certification (CSC) Exam

Category - Free CSC Practice Test Questions

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In what part of the heart do cardiac impulses originate?

SA node
AV node
Bundle of His
Left atrium

Explanation

Answer: A - Cardiac impulses originate in the SA node. From here, they spread to the atria and cause depolarization, showing up on the EKG as a P wave.

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