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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
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The correct answer is choice c. Contractions.
Choice A rationale:
Epigastric pain is not a common complication following an amniocentesis. It is more often associated with conditions like preeclampsia or gastrointestinal issues.
Choice B rationale:
Hypertension is not directly related to amniocentesis. It is more commonly associated with conditions like preeclampsia or chronic hypertension in pregnancy.
Choice C rationale:
Contractions are a significant complication to monitor for after an amniocentesis, especially at 33 weeks of gestation. The procedure can sometimes induce preterm labor.
Choice D rationale:
Vomiting is not a typical complication following an amniocentesis. It may occur due to other unrelated reasons but is not directly linked to the procedure.
Correct Answer is A
Explanation
These are signs of severe dehydration in an infant, which can be life-threatening and should be reported to the provider immediately. The infant may need intravenous fluids and electrolytes to restore hydration and prevent complications.
Choice B is wrong because a temperature of 38° C (100.4° F) and pulse rate of 124/min are not abnormal for an infant and do not indicate severe dehydration. These are common findings in an infant who has gastroenteritis, which is an inflammation of the stomach and intestines caused by a virus, bacteria, or parasite.
Choice C is wrong because decreased appetite and irritability are also common findings in an infant who has gastroenteritis, but they do not indicate severe dehydration. The nurse should encourage oral rehydration with fluids such as breast milk, formula, or oral electrolyte solution.
Choice D is wrong because pale skin and a 24-hr fluid deficit of 30 mL are not signs of severe dehydration in an infant.
A fluid deficit of 30 mL is less than 1 oz and is not significant for an infant who weighs about 10 kg (22 lbs). A fluid deficit of more than 10% of body weight would indicate severe dehydration.
Normal ranges for vital signs in infants are as follows:
- Temperature: 36.5° C to 37.5° C (97.7° F to 99.5° F)
- Pulse rate: 100 to 160/min
- Respiratory rate: 30 to 60/min
- Blood pressure: 65/41 to 100/50 mm Hg
Normal ranges for fluid intake and output in infants are as follows:
- Fluid intake: 100 to 150 mL/kg/day
- Fluid output: 1 to 2 mL/kg/hr
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