A patient admitted with acute kidney injury due to dehydration has oliguria, anemia, and hyperkalemia. Which prescribed action should the nurse take first?

Choice A rationale
Pericardiocentesis is a procedure used to remove fluid from the pericardial sac and is not typically used to treat atrial fibrillation. It is more commonly indicated for conditions such as pericardial effusion or cardiac tamponade.

Choice B rationale
Septal myectomy is a surgical intervention to remove part of the thickened septal wall that separates the ventricles of the heart. It is primarily used to treat hypertrophic cardiomyopathy, not atrial fibrillation.

Choice C rationale
A pericardial window is a procedure that creates an opening in the pericardium to allow fluid to drain into the surrounding chest cavity. This procedure is not a treatment for atrial fibrillation.

Choice D rationale
Synchronized electrical cardioversion is a procedure where a controlled electric shock is delivered to the heart to restore a normal rhythm. It is a common and effective treatment for atrial fibrillation, especially when the condition is causing significant symptoms like palpitations, lightheadedness, and shortness of breath.

Choice A rationale
The red blood cell (RBC) count is not typically affected by hemodialysis. Hemodialysis is a process that primarily targets the removal of waste products and excess fluid from the blood, not red blood cells.

Choice B rationale
Potassium levels are often elevated in clients with renal failure due to the kidneys' inability to excrete potassium. Hemodialysis helps to remove excess potassium from the bloodstream, thereby decreasing its levels.

Choice C rationale
Calcium levels can be affected by hemodialysis; however, they are more often managed with medication and diet rather than being directly targeted by the dialysis process itself.

Choice D rationale
Protein levels should not decrease significantly as a result of hemodialysis. The dialysis membrane is designed to allow small waste products to pass through while retaining larger molecules like proteins.