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: While having at least one stool per day is a sign that lactulose is working, it does not directly indicate its effectiveness in reducing ammonia levels and improving mental status.
Choice B reason: Denial of nausea and vomiting is positive but is not a direct indicator of lactulose's effectiveness in treating hepatic encephalopathy.
Choice C reason: A decrease in bilirubin levels may be a positive sign, but it is not a direct indicator of lactulose's effectiveness in treating hepatic encephalopathy.
Choice D reason: The client being alert and oriented is a direct indicator that lactulose is effectively reducing ammonia levels and improving mental status, which is a key goal in treating hepatic encephalopathy associated with liver cirrhosis.
Correct Answer is B
Explanation
Choice A reason: Screening for metastasis is not typically necessary for BCC because it rarely metastasizes.
Choice B reason: Minimizing sun exposure is crucial in reducing the risk for future BCC, as UV radiation is a significant risk factor.
Choice C reason: Watchful waiting is not a standard treatment plan for BCC; treatment usually involves removal of the lesion.
Choice D reason: Low-dose systemic chemotherapy is generally not used to treat BCC; local treatments such as surgery or topical medications are preferred.
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