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136732 Surgery

A 43-year-old woman develops acute renal failure following an emergency resection of a leaking abdominal aortic aneurysm.Three days after surgery, the following laboratory values are obtained:* Serum electrolytes (mEq/L): Na+:127;K+:5.9;Cl-:92;HCO3-:15* Blood urea nitrogen: 82 mg/dL* Serum creatinine: 6.7 mg/dLThe patient has gained 4 kg since surgery and is mildly dyspneic at rest. Eight hours after these values are reported, the electrocardiogram shown below is obtained. The initial treatment for this patient should be

A10% calcium gluconate, 10 mL
BDigoxin, 0.25 mg every 3 h for three doses
COral Kayexalate
DLidocaine, 100 mg
Surgery
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