Clinical meaning
Post-cardiac arrest care addresses the unique pathophysiology that follows return of spontaneous circulation (ROSC) after cardiac arrest. The post-cardiac arrest syndrome includes brain injury from global ischemia-reperfusion, myocardial dysfunction (stunned myocardium), systemic ischemia-reperfusion response, and the persistent precipitating pathology. Targeted temperature management (TTM) at 32-36°C for 24 hours is the most evidence-based neuroprotective intervention, reducing cerebral metabolic demand and mitigating reperfusion injury. Hemodynamic optimization targets MAP > 65 mmHg and avoidance of hypotension. Oxygenation management avoids both hypoxemia (SpO2 < 94%) and hyperoxia (which generates free radicals). Glucose management targets 144-180 mg/dL avoiding hypoglycemia. Seizure management is critical as post-arrest seizures worsen neurological outcomes. Prognostication should be delayed at least 72 hours after normothermia to allow for accurate neurological assessment.
Exam relevance
Risk factors: - Prolonged cardiac arrest time before ROSC (>20 minutes) - Unwitnessed arrest with unknown down time - Non-shockable initial rhythm (PEA, asystole) - Pre-existing cardiac disease and comorbidities - Delay in initiating targeted temperature management