A client with end stage renal disease presents to the emergency department with severe fatigue, palpitations, and muscle weakness.
The electrocardiogram reveals peaked T waves and a widened QRS complex. Which treatment should the nurse anticipate?
Administer a loop diuretic.
Administer furosemide.
Initiate hemodialysis.
Increase fluid intake.
The Correct Answer is C
Managing electrolyte imbalances in end stage renal disease requires understanding renal excretion failures. The presence of cardiac rhythm changes indicates a life threatening emergency. Immediate intervention is necessary to remove toxins and excess ions that the kidneys cannot process.
Choice A rationale
Loop diuretics are ineffective for clients with end stage renal disease because the nephrons are no longer functional. These medications cannot induce diuresis or lower serum potassium levels when the kidneys have reached the point of failure.
Choice B rationale
Similar to other loop diuretics, furosemide relies on renal blood flow and functional kidney tissue to promote fluid and electrolyte excretion. In end stage failure, this medication will not resolve the cardiac symptoms or hyperkalemia.
Choice C rationale
This is the definitive treatment for life threatening hyperkalemia in renal failure. Dialysis rapidly removes excess potassium and metabolic waste from the blood. It corrects the electrical instability in the heart caused by the high potassium levels.
Choice D rationale
Increasing fluid intake is contraindicated in end stage renal disease due to the risk of fluid volume overload. This would exacerbate the client's condition, potentially leading to pulmonary edema, hypertension, and worsening of the cardiac strain.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
This scenario requires applying advanced cardiac life support protocols for post-arrest arrhythmias. Knowledge of autonomic nervous system pharmacology is essential to identify the specific medication that increases heart rate by blocking parasympathetic vagal inhibition on the sinoatrial node during symptomatic bradycardia.
Choice A rationale
Magnesium sulfate is primarily utilized to treat torsades de pointes or hypomagnesemia. It acts as a calcium channel blocker in myocardial cells but does not specifically increase heart rate for bradycardia when normal sinus rhythm has already been restored.
Choice B rationale
Sodium bicarbonate is administered to treat specific metabolic acidosis or certain drug toxicities during prolonged arrest. It does not possess chronotropic properties and will not increase the heart rate in a client suffering from a symptomatic slow rhythm.
Choice C rationale
Atropine is an anticholinergic drug that inhibits the vagus nerve, effectively increasing the firing rate of the sinoatrial node. It is the first-line medication for symptomatic bradycardia to improve cardiac output and maintain adequate systemic tissue perfusion.
Choice D rationale
Epinephrine is a potent vasopressor and inotrope used primarily during active pulseless arrest. While it increases heart rate, atropine is specifically indicated first for a restored rhythm that remains slow and symptomatic before progressing to more powerful infusions.
Correct Answer is C
Explanation
Identifying cardiac arrhythmias requires understanding the relationship between electrical conduction and mechanical output. Knowledge of pulse deficits is necessary to recognize when rapid, irregular atrial contractions fail to produce adequate ventricular filling and a palpable peripheral pulse.
Choice A rationale
Blood pressure discrepancies between the upper limbs usually indicate vascular issues like aortic dissection or peripheral arterial disease. Atrial fibrillation affects the rhythm and volume of the pulse rather than creating localized pressure differences between the arms.
Choice B rationale
Variations in lung sounds typically suggest localized pulmonary pathology such as pneumonia or pleural effusion. While atrial fibrillation can lead to heart failure and pulmonary edema, it does not specifically cause differences between upper and lower sounds.
Choice C rationale
A pulse deficit occurs when the apical heart rate is higher than the radial rate. In atrial fibrillation, some ventricular contractions are too weak to perfuse to the periphery, making this a classic assessment finding.
Choice D rationale
Discrepancies between oral and axillary temperatures relate to thermoregulation and measurement accuracy rather than cardiac rhythm. Temperature monitoring is used to screen for infection or inflammation but does not provide diagnostic information regarding atrial arrhythmias..
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