In cardiac arrest management, when is bicarbonate typically used?

• A. Bicarbonate is reserved for specific circumstances
• B. Bicarbonate is given routinely to all patients
• C. Bicarbonate is contraindicated in all arrests
• D. Bicarbonate is first-line for metabolic acidosis

Answer: (A)

Bicarbonate during cardiac arrest is not used routinely; it’s reserved for specific circumstances where its benefits may outweigh the risks. During CPR, acidosis mainly reflects poor perfusion, and giving bicarbonate can raise serum pH but also increases CO2, which can diffuse into cells and worsen intracellular acidosis, potentially impairing cardiac function and the response to vasopressors. It can also cause a sodium load and volume shifts that may not help and can even cause harm if given indiscriminately. Therefore, routine administration to all arrest patients is not supported. Bicarbonate is considered when there is a known preexisting metabolic acidosis, significant hyperkalemia, or certain poisonings (for example, some drug overdoses) where correcting acidosis or alkalinizing the serum can be beneficial as part of a targeted treatment approach. In the usual course of ACLS, focus remains on high-quality CPR and addressing reversible causes, with bicarbonate reserved for those specific scenarios.