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","E"]
Explanation
A. Pertussis, or whooping cough, primarily affects the respiratory tract, particularly the trachea and bronchi, not just the nostrils.
B. Pertussis is caused by the bacterium Bordetella pertussis, making this statement incorrect as the infection is bacterial, not viral.
C. The toxins released by Bordetella pertussis damage the cilia of epithelial cells in the respiratory tract, leading to difficulty in clearing secretions.
D. The inflammation of the lungs and airways is a characteristic response to the infection, contributing to the symptoms of coughing and difficulty breathing.
E. The production of thick, mucus secretions is a hallmark of pertussis, which makes it challenging for the child to expel them, leading to severe coughing fits.
Correct Answer is B
Explanation
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.