A nurse in an emergency department is reviewing a client's ECG reading.
Which of the following findings should the nurse identify as an indication that the client has first-degree heart block?
Prolonged PR intervals.
Nondiscernible P waves.
More P waves than QRS complexes.
No correlation between P and QRS waves.
The Correct Answer is A
First-degree heart block is a type of atrioventricular (AV) block that involves the consistent prolongation of the PR interval (defined as >0.20 seconds) due to delayed conduction via the atrioventricular node.
This is seen on an ECG as a PR interval greater than 200 ms in length.
Choice B: Nondiscernible P waves are not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Choice C: More P waves than QRS complexes is not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Choice D: No correlation between P and QRS waves is not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Hepatitis A is a highly contagious liver infection caused by the hepatitis A virus and is most likely to be contracted from contaminated food or water or from close contact with a person or object that’s infected.
The hepatitis A vaccine can protect against hepatitis A and is recommended for travelers to high-risk areas.
Choice B is incorrect because hepatitis A is not transmitted through blood-to-blood exposure but rather through ingestion of contaminated food or water or through direct contact with an infectious person.
Choice C is incorrect because antibiotics are not used to treat viral infections such as hepatitis
A. Choice D is incorrect because the incubation period of hepatitis A is typically 2-6 weeks, not 5-10 days.
Correct Answer is C
Explanation
The nurse’s priority for immediate intervention is tachypnea, which is rapid breathing.
Tachypnea can be a sign of respiratory distress and requires immediate intervention.
Choice A is wrong because while a fever may indicate an infection, it is not the priority for immediate intervention.
Choice B is wrong because while blood-tinged secretions may indicate bleeding, it is not the priority for immediate intervention.
Choice D is wrong because while IV infiltration may cause discomfort and require attention, it is not the priority for immediate intervention.
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