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 C
Explanation
Choice A reason: Lactated Ringer's solution does not provide the necessary glucose and may not be compatible with TPN.
Choice B reason: 0.45% sodium chloride (0.45% NaCl) is a hypotonic solution and does not provide adequate calories for a patient on TPN.
Choice C reason: 10% dextrose in water (D10W) is the appropriate choice as it provides a source of calories and prevents hypoglycemia until the next TPN bag is available.
Choice D reason: 5% dextrose in lactated Ringer's solution (D5LR) provides less dextrose than D10W and may not prevent hypoglycemia as effectively.
Correct Answer is A
Explanation
Choice A reason (client care): A client reporting shortness of breath may be experiencing a life-threatening situation that aligns with the ABCs (Airway, Breathing, Circulation) of patient prioritization. This client requires immediate assessment and intervention.
Choice B reason (client care): While discharge is important, it does not take precedence over a client with potential respiratory distress.
Choice C reason (client care): A client who received pain medication 30 minutes ago is likely stable and can be seen after more urgent cases are addressed.
Choice D reason (client care): A client waiting for an abdominal x-ray is not a priority over a client with respiratory issues.
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