NCLEX RN Predictor Exam Related

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Each small square on the EKG paper is:

  • A. 0.04 seconds long and 5mm tall
  • B. 0.2 seconds long and 5mm tall
  • C. 0.04 seconds long and 20mm tall
  • D. 0.04 seconds long and 1mm tall
Correct Answer: D

Rationale: Each small square on an EKG paper represents 0.04 seconds long and 1mm tall. This standardization is essential for accurate measurements. One large square on EKG paper consists of 5 small squares in length and 5 small squares in height, which equals 0.2 seconds long and 5mm tall (0.5 mV). Choice A is incorrect because while the duration is correct, the height mentioned is not accurate. Choice B is incorrect as it provides the correct height but the duration is inaccurate. Choice C is incorrect as the height mentioned is exaggerated, and the duration is correct but the height is not. Therefore, the correct answer is 0.04 seconds long and 1mm tall.