Practice Quiz

NREMT Paramedic Certification Exam

Category - Paramedic

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What is the duration of a QRS complex in the ECG cycle?
  1. 20-40 ms
  2. 40-80 ms
  3. 20-120 ms
  4. 120-140 ms
Explanation
Answer - C - The duration of the QRS complex is around 80-120 ms.
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Additional Answers

Tyler Yeomans says:

The normal duration of the QRS complex is between 0.08 and 0.10 seconds — that is, 80 and 100 milliseconds. When the duration is between 0.10 and 0.12 seconds (100-120 ms), it is intermediate or slightly prolonged. The answer choice also reads incorrectly- option states as 20-120

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