One day after missing her dialysis treatment, a 27-year-old woman comes to the physician because of generalized weakness. Her blood pressure is 95172 mm Hg, and pulse is 45/min and regular. Examination shows a well-functioning arteriovenous fistula in the left upper extremity. Muscle strength is 315 in all extremities. An ECG shows third-degree atrioventricular block. Laboratory studies are ordered. Which of the following is the most appropriate next step in management?
- O A) Kayexalate-sorbitol enema
- O B) Intravenous administration of calcium gluconate
- O C) Oral administration of sodium polystyrene sulfonate (Kayexalate)
- O D) Immediate placement of a pacemaker
- O E) No treatment pending laboratory results
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