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 A
Explanation
A. A child with varicella (chickenpox) should return to school only after all the blisters have crusted over, indicating that the infectious stage has passed and they are no longer contagious.
B. Receiving the varicella vaccine does not apply to children who already have the infection; vaccination is preventive, not a treatment for those already infected.
C. Completing one week of antiviral medication is not a sufficient criterion for returning to school, as the child may still be contagious until all lesions are crusted.
D. Returning to school as soon as the rash appears is not safe, as the child is highly contagious during the initial rash stage and until all lesions have crusted.
Correct Answer is C
Explanation
A. The meningococcal (MCV4) vaccine is typically recommended for preteens and adolescents, usually starting at age 11.
B. The hepatitis B vaccine is typically administered at birth, 1-2 months, and 6-18 months, so a 4-year-old may already have received this vaccine.
C. The varicella (VAR) vaccine is recommended for children at ages 12-15 months and again at 4-6 years, making it appropriate for a 4-year-old child.
D. The Haemophilus influenza type b (Hib) vaccine is usually given to children in a series before 5 years of age, but it is more commonly completed by age 2-3 years. The 4-year-old may already be up to date with this vaccine.