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 (acute renal failure): Patients recovering from acute renal failure are not typically restricted to only vegetable proteins. Protein needs can vary based on the individual's condition and treatment plan.
Choice B reason (acute renal failure): Fluid intake recommendations for patients recovering from acute renal failure depend on their current kidney function and fluid balance status. A blanket restriction to 1500 mL or less per day may not be appropriate for all patients.
Choice C reason (acute renal failure): Avoiding nephrotoxic drugs is crucial for patients recovering from acute renal failure to prevent further kidney damage.
Choice D reason (acute renal failure): Self-catheterization for residual urine is not a standard recommendation for all patients recovering from acute renal failure. This would be specific to patients with urinary retention issues.
Correct Answer is A
Explanation
Choice A reason: Level of consciousness is the most basic and sensitive indicator of altered brain function and is considered the most reliable indicator of neurologic status.
Choice B reason: Temperature is not a direct indicator of neurologic status and does not change as rapidly in response to neurologic events.
Choice C reason: Blood pressure can be affected by neurologic changes, but it is not as sensitive or specific as the level of consciousness.
Choice D reason: Pulse rate is not a direct indicator of neurologic status and can be influenced by a variety of non- neurologic factors.
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