TEME Practice Questions - TEME - Título De Especialista Em Medicina De Emergência (ABRAMEDE, Brazil) Exam

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A 54-year-old male with end-stage renal disease on hemodialysis missed his last two dialysis sessions. He arrives in the emergency department confused and hypotensive, and abruptly suffers cardiac arrest with PEA. The telemetry strip immediately prior to arrest showed peaked T waves, absent P waves, and severe QRS widening ('sine wave' appearance). Alongside CPR and epinephrine, which immediate pharmacological intervention is essential to stabilize the cardiac membrane?

Intravenous Calcium Chloride 10% (10 mL / 1 g) or Calcium Gluconate 10% (30 mL / 3 g). Subcutaneous regular insulin 50 units without dextrose. Intravenous potassium chloride 20 mEq infusion over 15 minutes. High-dose intravenous magnesium sulfate 10 g push.

Correct Answer:

Intravenous Calcium Chloride 10% (10 mL / 1 g) or Calcium Gluconate 10% (30 mL / 3 g).

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