During medical arrest, after 20 minutes of resuscitation, which elements must be continued?

• A. CPR; Effective ventilation with 100% oxygen; ACLS medications if available; Confirm no organized rhythm or PEA <40 or No Shock Advised on AED
• B. Only CPR
• C. Ventilation only
• D. No resuscitation performed

Answer: (A)

The main idea is that resuscitation during a prolonged medical arrest should remain comprehensive. Even after 20 minutes of effort, you continue essential ACLS interventions: high-quality chest compressions (CPR) to maintain cerebral and myocardial perfusion, effective ventilation with adequate oxygen (often 100% oxygen), ACLS medications as available (to support perfusion and rhythm control), and regular rhythm assessment with the monitor/AED to determine if shock is advised or not. If the rhythm is not organized, or if it’s PEA or asystole and the AED shows no shock advised, you keep resuscitation measures going and reassess periodically. These elements work together to maximize the chance of return of spontaneous circulation and good neurologic outcome.

The other options fall short because they omit critical parts of resuscitation. Providing only CPR neglects oxygenation and medication support; ventilation only ignores ongoing perfusion needs; and stopping all resuscitation contradicts the goal of continuing ACLS efforts until ROSC is achieved or formal termination criteria are met.