A nurse is analyzing a client's electrocardiogram (ECG) strip and identifies the following information: Heart rate: 92/min Rhythm: Irregular P wave:
Unable to identify PR interval:
Unable to measure QRS duration:
0.10 seconds Based upon this information,
thenurse should interpret the client's rhythm as indicating which of the following?
Supraventricular tachycardia
Atrial fibrillation
Sinus bradycardia
First-degree heart block
The Correct Answer is B
A. Supraventricular tachycardia (SVT) typically has identifiable P waves; the absence of P waves suggests a different condition.
B. Atrial fibrillation is characterized by an irregular rhythm, inability to identify P waves, and varying intervals. This interpretation aligns with the client's ECG findings.
C. Sinus bradycardia would show identifiable P waves and a regular rhythm with a heart rate less than 60 bpm, which does not match the provided information.
D. First-degree heart block would also show identifiable P waves and regularity in the rhythm with a prolonged PR interval, which is not indicated here.
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Correct Answer is ["C","D"]
Explanation
A. Object permanence is a cognitive ability typically developed during the sensorimotor stage (0-2 years), not during the concrete operational stage (7-11 years).
B. Egocentric thinking is characteristic of the preoperational stage (2-7 years) and decreases as children enter the concrete operational stage.
C. The ability to perform logical operations on concrete objects is a hallmark of the concrete operational stage, where children can think logically about physical objects and events.
D. Understanding the concept of conservation, which refers to recognizing that quantity does not change despite changes in shape or arrangement, is a key characteristic of the concrete operational stage.
E. Use of symbolic play is more characteristic of the preoperational stage, where children engage in imaginative play rather than concrete operations.
Correct Answer is D
Explanation
A. The ASO titer does not measure therapeutic levels of aminoglycosides; this response is incorrect.
B. The ASO titer is not a direct diagnostic test for rheumatic fever but indicates a recent infection with streptococcal bacteria, which can lead to rheumatic fever.
C. The test does not confirm immunity but rather measures antibodies against streptolysin O, indicating recent infection.
D. An elevated ASO titer confirms that the child had a recent streptococcal infection, which is important in diagnosing rheumatic fever.