It is common for another cardiac arrest within ___ hours of ROSC?

It is common for another cardiac arrest within ___ hours of ROSC?

• A. 6
• B. 12
• C. 24
• D. 48

Answer: (C)

After return of spontaneous circulation, the heart and circulation remain unstable. Reperfusion injury, ongoing myocardial dysfunction, and systemic derangements such as electrolyte shifts, acidosis, and fluctuating blood pressure create a fertile ground for new arrhythmias or a recurrent arrest. This makes the first 24 hours after ROSC the highest-risk window for another cardiac arrest. Among the given time frames, 24 hours best captures when recurrences are most commonly seen, whereas shorter windows miss part of the risk and longer ones describe a later, lower-risk period. This is why post-arrest care emphasizes continuous monitoring and rapid correction of reversible causes in the first day after ROSC.

After return of spontaneous circulation, the heart and circulation remain unstable. Reperfusion injury, ongoing myocardial dysfunction, and systemic derangements such as electrolyte shifts, acidosis, and fluctuating blood pressure create a fertile ground for new arrhythmias or a recurrent arrest. This makes the first 24 hours after ROSC the highest-risk window for another cardiac arrest. Among the given time frames, 24 hours best captures when recurrences are most commonly seen, whereas shorter windows miss part of the risk and longer ones describe a later, lower-risk period. This is why post-arrest care emphasizes continuous monitoring and rapid correction of reversible causes in the first day after ROSC.