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 D
Explanation
Choice A reason: Lethargy implies a state of sluggishness, drowsiness, or fatigue, not the inability to respond to stimuli.
Choice B reason: Stupor refers to a state of near-unconsciousness or insensibility, but the patient may respond to vigorous stimulation.
Choice C reason: Obtundation describes a state of consciousness characterized by a reduced alertness and a slow response to stimuli, but not complete unresponsiveness.
Choice D reason: Comatose is the correct term for a state of deep unconsciousness in which a patient cannot be aroused, fitting the description of the patient's condition.
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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