Ace the Advanced Cardiovascular Life Support Test 2025 – Pump Up Your Skills and Save Lives!

Question: 1 / 400

What is the critical time frame following cardiac arrest within which defibrillation increases survival?

Within 1 to 2 minutes

Within 3 to 5 minutes

Defibrillation is critical for patients experiencing ventricular fibrillation or pulseless ventricular tachycardia, as it restores effective heart rhythm and can significantly enhance the chances of survival. The most effective time frame for defibrillation to occur is within 3 to 5 minutes post-cardiac arrest. This is based on evidence showing that the likelihood of return of spontaneous circulation (ROSC) decreases notably after this period due to the progressive ischemia and damage to cardiac tissue.

The chance of survival diminishes rapidly after 5 minutes, making timely defibrillation pivotal in improving outcomes. Early intervention plays a key role; hence, beyond the 3 to 5-minute threshold, the effectiveness of defibrillation drops significantly, and the likelihood of neurological recovery diminishes as well.

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Within 6 to 10 minutes

Within 15 to 20 minutes

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