What is the target chest compression fraction (CCF) during resuscitation?

• A. At least 60%
• B. At least 70%
• C. At least 90%
• D. At least 80%

Answer: (D)

Chest compression fraction reflects how much of the resuscitation time you spend actively delivering chest compressions. The aim is to minimize interruptions, because continuous compressions help sustain coronary and cerebral perfusion during cardiac arrest. The recommended target is at least eighty percent, because keeping compressions going for the vast majority of the time markedly improves perfusion pressures and increases the likelihood of return of spontaneous circulation and better outcomes. Achieving eighty percent is practical in most settings, while higher targets (near 90% or more) are ideal when possible, though they require careful coordination during rhythm checks, defibrillation, and airway management. If the fraction drops below eighty, there’s more no-flow time, which reduces perfusion and worsens prognosis.