Practice Quiz

Cardiac Subspecialty Certification (CSC) Exam

Category - Free CSC Practice Test Questions

Start a Study Session Sign up for Question of the Day

What is the measurement provided by the PR interval on an EKG?

  1. The time needed for the impulse to spread through the ventricles and pass through the SA node
  2. The time needed for the impulse to spread through the atria and pass through the SA node
  3. The time needed for the impulse to spread through the ventricles and pass through the AV junction
  4. The time needed for the impulse to spread through the atria and pass through the AV junction
Explanation

Answer: D - The PR interval on an EKG measures the time needed for the impulse to spread through the atria and pass through the AV junction. The normal time for this to occur is .12-.20 seconds. Longer intervals can indicate blockage.

Previous Next
Was this helpful? Upvote!
Login to contribute your own answer or details
Start a Study Session Sign up for Question of the Day

Top questions

Related questions

Most popular on PracticeQuiz