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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?

A.

Premature atrial complexes

B.

Complete heart block

C.

Atrial fibrillation

D.

First-degree atrioventricular block

Answer and Explanation

The Correct Answer is D

A.    Incorrect. Premature atrial complexes do not typically affect the P-R interval. They are characterized by an early P-wave followed by a QRS complex.
B.    Incorrect. Complete heart block is characterized by a dissociation between the P-waves and QRS complexes, resulting in no relationship between atrial and ventricular activity.
C.    Incorrect. Atrial fibrillation is characterized by chaotic and irregular atrial activity without distinct P-waves, making the P-R interval irrelevant.
D.    Correct. In first-degree atrioventricular block, the P-R interval is prolonged beyond the normal range of 0.12-0.20 seconds. A constant P-R interval of 0.35 seconds indicates a first- degree atrioventricular block.


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Related Questions

Correct Answer is D

Explanation

A. Penicillin G should be infused slowly over a period of 10 to 15 minutes to prevent adverse reactions such as seizures.
B. Incorrect. Checking for a sulfa allergy is not relevant to the administration of penicillin, as sulfa and penicillin are different types of antibiotics.

C. Incorrect. Refrigeration is not typically required for penicillin G after reconstitution.

D. IDiarrhea can be a sign of a serious condition called antibiotic-associated colitis, which requires immediate medical attention.

Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"E"}

Explanation

Pyrexia, also known as fever, refers to an elevated body temperature that is above the normal range. The normal body temperature is typically around 37°C (98.6°F), and a temperature of 38.4°C (101.1°F) indicates a fever.

Alternative Choices:

1. "tachycardia" due to "heart rate of 92/min"

  • Incorrect. Tachycardia refers to an abnormally high heart rate, usually above 100 beats per minute (bpm) in adults. A heart rate of 92/min is within normal limits and does not qualify as tachycardia.

2. "hypertension" due to "blood pressure of 130/78 mm Hg"

  • Incorrect. Hypertension is defined as having a blood pressure reading consistently above 140/90 mm Hg. The reading of 130/78 mm Hg falls into the elevated category but does not reach the threshold for hypertension.

3. "respiratory distress" due to "respiratory rate of 18/min"

  • Incorrect. A respiratory rate of 18 breaths per minute is considered normal for adults, so this finding does not indicate respiratory distress.

4. "obesity" due to "current BMI of 29.9"

  • Partially correct. A BMI of 29.9 places the client in the "overweight" category, just below the threshold for obesity (BMI of 30 or higher). However, the presence of pyrexia is the more immediate clinical concern based on the provided vital signs.

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