The nurse is told in report that the client's PR interval is within normal limits. Which of the following would the nurse anticipate as a result of receiving this information? The client's PR interval would:
1. Be between 0.12 and 0.20 seconds.
2. Be between 0.06 and 0.12 seconds.
3. Be between 0.34 and 0.43 seconds.
4. Extend between 8.5 to 11 small boxes on the ECG paper.
Be between 0.12 and 0.20 seconds.
Rationale: If a PR interval is within normal limits, it will be between 0.12 and 0.20 seconds, which is equal to 3 to 5 small boxes. The normal QRS width is between 0.06 and 0.12 seconds, which is equal to 1.5 to 3 small boxes. The normal QT interval is between 0.34 to 0.43 seconds, which is equal to 8.5 to 11 small boxes.
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