A nurse on a telemetry unit is assessing a client who is receiving continuous cardiac monitoring. The client's heart rate is 69/min and the PR interval is 0.24 seconds. The nurse should interpret this finding as which of the following cardiac rhythms?
Atrial fibrillation
First-degree AV block
Premature ventricular contraction
Sinus bradycardia
The Correct Answer is B
The correct answer is B.
Choice A reason: Atrial fibrillation is characterized by a rapid, irregular heartbeat and an absence of distinct P waves on the ECG, which is not indicated by the information provided.
Choice B reason: First-degree AV block is indicated by a prolonged PR interval without affecting the overall heart rate, aligning with the client’s PR interval of 0.24 seconds.
Choice C reason: Premature ventricular contraction would show an abnormal QRS complex on the ECG, which is not mentioned in the scenario.
Choice D reason: Sinus bradycardia is defined by a heart rate less than 60 bpm, which does not apply here as the client’s heart rate is 69/min, within the normal range of 60-100 bpm.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
The correct answer is choice D. This test should be performed after your baby is 24 hours old. This is because newborn genetic screening is a set of laboratory tests that detect a set of known genetic diseases that can affect a child’s long-term health or survival. The test is performed on a blood sample obtained from a heel prick when the baby is two or three days old. Performing the test after 24 hours ensures that the baby has had enough time to metabolize certain substances that could interfere with the accuracy of the test.
Choice A is wrong because the blood sample is not drawn from the baby’s inner elbow, but from the heel. Choice B is wrong because the baby does not need to drink water prior to the test, as this could dilute the blood sample and affect the results. Choice C is wrong because the test does not need to be repeated when the baby is 2 months old, unless there is a positive or inconclusive result from the first test.
Newborn genetic screening is important for early detection and intervention of certain conditions that can cause serious health problems or disability if left untreated. Parents should be informed about the benefits and limitations of the test, as well as their rights and options regarding consent and confidentiality.
Correct Answer is C
Explanation
Choice A reason:
Administer epinephrine subcutaneously. This is not the necessary action to be taken. Epinephrine is used to treat severe allergic reactions (anaphylaxis). However, in this case, the client is experiencing a febrile non-haemolytic transfusion reaction, not an allergic reaction.
Choice B reason:
Place the blood bag in a biohazard bag before discarding. This is not the necessary action to be taken by the nurse. Proper disposal of biohazardous materials is essential, but in this situation, the nurse's priority is to address the client's condition and not the disposal of the blood bag
Choice C reason:
Documentation of the transfusion reaction is crucial for the client's medical history and for future reference. The nurse should record the client's signs and symptoms, the actions taken, and any other relevant information related to the reaction.
Choice D reason
Infuse 500 ml lactated Ringer's IV. This is not necessary action to be taken by the nurse because there is no indication for infusing lactated Ringer's solution in response to the transfusion reaction described. Treatment for febrile non-haemolytic transfusion reactions generally involves stopping the transfusion, administering antipyretics (like acetaminophen) if necessary, and providing supportive care as needed.
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