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Platinum Cardiac Practice Exam

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According to the 2020 AHA Guidelines, what is the recommended minimum chest compression fraction for a patient in cardiac arrest with an unprotected airway?
Correct Answer:
At least 80%
Explanation:
The key idea here is chest compression fraction, or the proportion of CPR time spent delivering chest compressions. Higher CCF means more continuous blood flow to the heart and brain, which improves survival chances. The 2020 AHA guidelines emphasize minimizing interruptions and delivering high-quality CPR. When the airway is unprotected, you still aim for a very high CCF by coordinating the team to keep compressions going as much as possible and making ventilation breaths quick and efficient to minimize pauses. The recommended minimum is 80%, so you want the majority of the resuscitation time spent on chest compressions rather than pauses for ventilation. If the CCF falls below this, perfusion decreases, whereas striving for 80% or more keeps perfusion at a higher level.

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