Cardiac Subspecialty Certification (CSC) Exam

Category - Free CSC Practice Test Questions

What is measured on an EKG by the horizontal squares?

  1. Q wave
  2. R wave
  3. Duration
  4. Voltage
Explanation

Answer: C - The horizontal squares on an EKG measure duration. This is based on cardiac electrical potentials that travel at the rate of 25mm/second.

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