A nurse is reviewing a client’s cardiac rhythm strips and notes a constant P-R interval of 0.35 seconds.
Which of the following dysrhythmias is the client displaying
Atrial fibrillation.
Complete heart block
First-degree atrioventricular block
Premature atrial complexes
The Correct Answer is C
- . Answer and explanation.
The correct answer is choice C, first-degree atrioventricular block.
This is because the PR interval is longer than normal, which indicates a delay in the conduction of electrical impulses from the atria to the ventricles through the AV node. A normal PR interval is 0.12 to 0.2 seconds, or 3 to 5 small squares on the EKG strip.
In this case, the PR interval is 0.35 seconds, which is more than 5 small squares.
Choice A is wrong because atrial fibrillation is a type of arrhythmia where the atria beat irregularly and rapidly, producing chaotic and variable P waves and an irregular ventricular response.
There is no constant PR interval in atrial fibrillation.
Choice B is wrong because complete heart block is a type of arrhythmia where there is no conduction of electrical impulses from the atria to the ventricles, resulting in independent and dissociated atrial and ventricular rhythms.
There are no consistent P waves or PR intervals in complete heart block.
Choice D is wrong because premature atrial complexes are extra beats that originate from the atria and interrupt the normal sinus rhythm.
They produce abnormal P waves that are different from the sinus P waves, and may have a shorter or longer PR interval depending on the timing of the impulse.
However, they do not cause a constant prolongation of the PR interval.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The correct answer is C. FHR baseline 170/min. This is because a normal FHR baseline is between 110 and 160 bpm, and anything above or below this range indicates fetal distress and should be reported to the provider. A FHR baseline of 170/min could indicate fetal tachycardia, which could be caused by maternal fever, infection, dehydration, fetal anemia, or fetal hypoxia.
Choice A is wrong because early decelerations in the FHR are normal and benign, and indicate head compression during contractions.
They do not require any intervention or reporting.
Choice B is wrong because contractions lasting 80 seconds are within the normal range for active labor, which is 40 to 90 seconds per contraction.
They do not indicate any complication or abnormality.
Choice D is wrong because a temperature of 37.4° C (99.3° F) is slightly elevated but not considered a fever. A fever is defined as a temperature of 38° C (100.4° F) or higher.
A mild increase in temperature could be due to dehydration, exertion, or environmental factors, and does not necessarily indicate infection or inflammation.
Correct Answer is ["B","C"]
Explanation
The correct answers are B and C.
Choice A Reason: Transferring a client who is receiving radiation therapy involves understanding the precautions and care associated with radiation, which may be beyond the training of assistive personnel (AP). Radiation therapy clients may have specific safety and transport protocols that require the expertise of licensed nursing staff.
Choice B Reason: Measuring vital signs for a client who requires contact precautions is a task that can be delegated to AP. Assistive personnel can be trained in infection control procedures and the use of personal protective equipment (PPE), making them capable of measuring vital signs while adhering to contact precautions.
Choice C Reason: Recording urine output for a client who has a suprapubic catheter can be delegated to AP. This task involves measuring and documenting a quantifiable data point, which does not require the clinical judgment of a nurse. AP can be trained to accurately measure and record urine output.
Choice D Reason: Planning care for a client who has dysphagia is a complex task that involves assessment and clinical judgment, which are responsibilities of the licensed nurse. Dysphagia can have serious complications, and care plans must be tailored to each client’s needs, requiring the expertise of a nurse.
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