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
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.
Correct Answer is D
Explanation
A. Weak pulses are more indicative of reduced cardiac output or other cardiac issues, rather than specifically a large patent ductus arteriosus (PDA).
B. Cyanosis with crying can occur in various conditions, but it is not a hallmark of a large PDA; it typically presents with other symptoms.
C. Chronic hypoxemia is more associated with severe heart defects or lung conditions, whereas a large PDA may present with other signs first.
D. A systolic murmur is a classic finding in large PDAs due to the left-to-right shunting of blood, making it the most expected manifestation in this scenario.