A 70-year-old male with chronic kidney disease presents to the emergency department with muscle weakness and an EKG showing peaked T waves. His potassium level is 7.1 mEq/L. Which of the following is the most immediate intervention to stabilize the cardiac membrane?
✓ Correct Answer: Option B
Calcium gluconate directly stabilizes the cardiac membrane, protecting against life-threatening arrhythmias in severe hyperkalemia, making it the most immediate intervention for cardiac stability.