The normal PR interval is:
0.04-0.20 seconds
0.12-0.20 seconds
Less than half the R-to-R ratio
0.08-0.10 seconds
The Correct Answer is B
Choice A reason: A PR interval of 0.04-0.20 seconds is too broad and includes values that are both below and above the normal range.
Choice B reason: A PR interval of 0.12-0.20 seconds is the established normal range for adults, reflecting proper conduction through the AV node.
Choice C reason: The PR interval being less than half the R-to-R ratio is not a standard measurement for PR intervals and does not provide a specific range.
Choice D reason: A PR interval of 0.08-0.10 seconds is below the normal range and may suggest pre-excitation or an AV nodal (junctional) rhythm.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: A healthy stoma should be beefy red and moist, indicating good blood supply and hydration.
Choice B reason: A dusky maroon color could indicate compromised blood supply or ischemia.
Choice C reason: A pale and pink stoma may suggest anemia or reduced blood flow.
Choice D reason: A stoma that is pink and dry could be dehydrated, which is not ideal.
Correct Answer is D
Explanation
Choice A reason: While painful and red-tinged urination is a concern, it is not directly related to the intravenous pyelogram procedure.
Choice B reason: The end of the menstrual period is not relevant to the intravenous pyelogram procedure.
Choice C reason: Drinking fluids is generally encouraged but does not need to be reported unless it is restricted before the procedure.
Choice D reason: The client's allergy to shellfish is important to report because the contrast dye used in an intravenous pyelogram may contain iodine, which can cause a reaction in people with shellfish allergies.
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