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: O. 1 0 seconds
Based upon this information, the nurse should interpret the client's rhythm as indicating which of the following?

Atrial fibrillation

Sinus bradycardia

Supraventricular tachycardia

First-degree heart block

Answer and Explanation

The Correct Answer is A

A. Atrial fibrillation: Atrial fibrillation is characterized by an irregularly irregular rhythm, absence of identifiable P waves, and irregular ventricular response. The heart rate in atrial fibrillation can be variable, and the absence of identifiable P waves indicates disorganized atrial electrical activity.

B. Sinus bradycardia: Sinus bradycardia is characterized by a regular rhythm with a heart rate less than 60 beats per minute (bpm) and normal P waves preceding each QRS complex. In sinus bradycardia, the PR interval and QRS duration are typically within normal limits.

C. Supraventricular tachycardia: Supraventricular tachycardia (SVT) is characterized by a regular rhythm with a heart rate greater than 100 bpm. SVT typically presents with narrow QRS complexes and may or may not have discernible P waves.

D. First-degree heart block: First-degree heart block is characterized by a prolonged PR interval (>0.20 seconds) but maintains a regular rhythm with normal QRS duration. In first-degree heart block, P waves are typically identifiable, and the rhythm is not irregular.

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Correct Answer is D

Explanation

A. Stress can contribute to the development of atrial flutter, but it is not the highest risk factor compared to other options.

B. While electrolyte imbalances resulting from vomiting and diarrhea can predispose someone to arrhythmias, they are not as significant a risk factor for atrial flutter as other conditions.

C. A family history of atrial flutter may increase the likelihood of developing the condition, but it is not as significant a risk factor compared to other options.

D. A history of myocardial infarction and stent placement indicates underlying heart disease, which is a significant risk factor for developing atrial flutter. Cardiac events like myocardial infarction can lead to structural changes in the heart, such as scarring or remodeling, which can predispose individuals to atrial flutter. Therefore, this client is at the highest risk for developing atrial flutter among the options provided.

A. "A deregulated cytokine storm causes an inflammatory response." B. "The major organ prone to injury during SIRS is the heart." C. "Spleen dysfunction causes blood clotting issues." D. "Activation of the inflammatory cascade causes increased perfusion."

Correct Answer is A

Explanation

A. "A deregulated cytokine storm causes an inflammatory response": Systemic inflammatory response syndrome (SIRS) is characterized by a dysregulated inflammatory response triggered by various insults such as infection, trauma, burns, or ischemia. In SIRS, the immune system responds excessively, leading to the release of pro-inflammatory cytokines (cytokine storm), including tumor necrosis factor-alpha (TNF-α), interleukin-1 (IL-1), and interleukin-6 (IL-6). This cytokine cascade results in widespread inflammation and systemic manifestations, such as fever, tachycardia, tachypnea, and leukocytosis.

B. "The major organ prone to injury during SIRS is the heart": While SIRS can lead to multi-organ dysfunction, including cardiac dysfunction, it does not primarily target the heart. SIRS affects multiple organs, including the lungs, kidneys, liver, and gastrointestinal tract. Cardiac dysfunction in SIRS may result from the inflammatory response, hypoperfusion, or direct myocardial injury.

C. "Spleen dysfunction causes blood clotting issues": SIRS can lead to coagulation abnormalities, but spleen dysfunction is not the primary cause. Coagulation abnormalities in SIRS are often attributed to endothelial dysfunction, activation of the coagulation cascade, and consumption of clotting factors, rather than spleen dysfunction.

D. "Activation of the inflammatory cascade causes increased perfusion": Activation of the inflammatory cascade in SIRS does not typically lead to increased perfusion. Instead, SIRS can lead to alterations in perfusion, including tissue hypoperfusion and microvascular dysfunction. In severe cases, SIRS can progress to septic shock, characterized by profound hypotension and inadequate tissue perfusion.

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Naxlex Comprehensive Predictor Exams

A nurse is teaching a group of clients about risk factors for developing atrial flutter. Which of the following clients should the nurse understand is at highest risk for developing atrial flutter?

Correct Answer is D

Explanation

A nurse is explaining the pathophysiology of systemic inflammatory response syndrome (SIRS) to a group of newly licensed nurses. Which of the following statements by the nurse is accurate?

Correct Answer is A

Explanation

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