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: Asking about numbness or tingling is important to rule out neurological issues that could be causing the neck pain.
Choice B reason: While heat and cold therapy may provide relief, it is not the first action to take before assessing the cause of the pain.
Choice C reason: Providing information about exercises is helpful but should come after an initial assessment.
Choice D reason: Teaching about NSAIDs is part of pain management but should follow an assessment of symptoms and potential causes.
Correct Answer is C
Explanation
Choice A reason: Recording the client's intake and output is important but not the highest priority in an unconscious patient following a cerebral hemorrhage.
Choice B reason: Performing passive range of motion exercises is a lower priority compared to maintaining a patent airway.
Choice C reason: Suctioning saliva from the client's mouth is the highest priority to maintain airway patency and prevent aspiration, which is critical for an unconscious patient.
Choice D reason: Monitoring the client's electrolyte levels is important but secondary to immediate life-saving interventions such as maintaining airway patency.
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