EKG Question #4

Question

What is the PR interval of the following electrocardiogram strip ?

Answers

  1. P-R interval is .18 sec
    • Rationale:
  2. P-R interval is .20 sec
    • Rationale:
  3. P-R interval is .28 sec
    • Rationale:
  4. P-R interval is .22 sec
    • Rationale:

Overview

Explanation

The ECG above reveals a P-R interval of 0.28 seconds or 7 small boxes. First-degree heart block may have sinus rhythm, but the P-R interval will be greater than 0.20 seconds. Normal P-R intervals range from 0.12 – 0.20 seconds (or 3-5 small boxes). Rate will usually be normal (60-100 beats/min); however, some clients may have bradycardia with a 1st Degree AV block. First degree AV Block is the most common heart block, but clients who have a history of MI or having an MI should be closely monitored.

Learning Outcomes

Test Taking Tip

Video Rationale