A 68-year-old male with chronic kidney disease presents with muscle weakness and fatigue. His ECG shows peaked T waves and a widened QRS complex. Labs reveal a serum potassium level of 7.2 mEq/L. Which of the following is the most appropriate initial intervention?
✓ Correct Answer: Option B
In severe hyperkalemia with ECG changes, intravenous calcium gluconate is the most appropriate initial intervention to stabilize cardiac myocyte membranes and prevent life-threatening arrhythmias, even before shifting potassium intracellularly.
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This 2-level USMLE Exam Prep question from the Step 3 – Clinical Management topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
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