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, the nurse should interpret the client’s rhythm as indicating which of the following?

Supraventricular tachycardia.

Atrial fibrillation.

Sinus bradycardia.

First-degree heart block.

Answer and Explanation

The Correct Answer is B

Choice A rationale
Supraventricular tachycardia (SVT) is characterized by a rapid heart rate originating above the ventricles, typically with a regular rhythm and identifiable P waves. The described ECG strip shows an irregular rhythm and an inability to identify P waves, which is not consistent with SVT5.
Choice B rationale
Atrial fibrillation (AF) is characterized by an irregularly irregular rhythm, absence of identifiable P waves, and variable PR intervals. The ECG findings of an irregular rhythm, inability to identify P waves, and a QRS duration of 0.10 seconds are consistent with AF6.
Choice C rationale
Sinus bradycardia is characterized by a regular rhythm with a heart rate less than 60 beats per minute and identifiable P waves preceding each QRS complex. The described ECG strip shows an irregular rhythm and an inability to identify P waves, which is not consistent with sinus bradycardia.
Choice D rationale
First-degree heart block is characterized by a prolonged PR interval with a regular rhythm. The described ECG strip shows an irregular rhythm and an inability to measure the PR interval, which is not consistent with first-degree heart block.

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Correct Answer is A

Explanation

Choice A rationale
Coronary arteries decrease in diameter leading to insufficient blood, oxygen, and nutrients reaching the heart muscle. This is correct because atherosclerosis, which is the buildup of plaque in the coronary arteries, causes the arteries to narrow. This narrowing reduces blood flow to the heart muscle, leading to ischemia and the manifestations of coronary artery disease, such as angina and myocardial infarction.
Choice B rationale
Manifestations occur due to dilation of coronary arteries with increased blood flow causing increased pressure. This is incorrect because the primary issue in coronary artery disease is the narrowing of the arteries, not their dilation. Increased blood flow and pressure are not typical causes of the manifestations of coronary artery disease.
Choice C rationale

Coronary arteries become more elastic causing the arteries to stretch as individuals age causing the heart not to receive enough oxygen. This is incorrect because the problem in coronary artery disease is not increased elasticity but rather the loss of elasticity and the buildup of plaque that narrows the arteries. As people age, the arteries tend to become less elastic, not more.
Choice D rationale
The heart and the coronary arteries weaken, leading to poor perfusion and resulting in angina. This is incorrect because the primary issue in coronary artery disease is the narrowing of the coronary arteries due to plaque buildup, not the weakening of the heart and arteries. While poor perfusion does result in angina, it is due to the narrowed arteries rather than weakened structures.

A. Chest pain and dyspnea. B. Seizures. C. Hematuria. D. Swelling of the extremities.

Correct Answer is B

Explanation

Choice A rationale
Chest pain and dyspnea are concerning symptoms but are not the most immediate manifestations to report in a client undergoing radiation therapy for brain cancer. These symptoms could be related to other conditions and require further evaluation.
Choice B rationale
Seizures are the most immediate manifestation to report because they indicate increased intracranial pressure or other neurological complications related to brain cancer and radiation therapy. Seizures require prompt medical intervention to prevent further complications.
Choice C rationale
Hematuria is a concerning symptom but is not the most immediate manifestation to report in this context. It could be related to other conditions and requires further evaluation.
Choice D rationale
Swelling of the extremities is a concerning symptom but is not the most immediate manifestation to report in this context. It could be related to other conditions and requires further evaluation.

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Naxlex Comprehensive Predictor Exams

A nurse is providing teaching to a client who has coronary artery disease. Which of the following statements should the nurse include in the teaching to explain the correlation between changes in the coronary arteries and manifestations that occur?

Correct Answer is A

Explanation

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Correct Answer is B

Explanation

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