What is the minimum recommended chest compression fraction according to the AHA?

The minimum recommended chest compression fraction, according to the American Heart Association (AHA), is 80%. This figure represents the proportion of time during a cardiac arrest event that high-quality chest compressions are delivered relative to the total time that a patient is in cardiac arrest. Achieving at least an 80% chest compression fraction is crucial because it is associated with better outcomes for patients. This threshold ensures that compressions are being performed effectively and consistently, maximizing blood circulation to vital organs during the resuscitation process. A compression fraction of 80% helps to maintain adequate blood flow, which is pivotal for improving the chances of survival and favorable neurological recovery following cardiac arrest.

The focus on maintaining a high compression fraction reflects the importance placed on minimizing interruptions in chest compressions. If the compression fraction is lower, it indicates that there may be excessive pauses for ventilation or other interventions, which could compromise the effectiveness of cardiopulmonary resuscitation (CPR) efforts. This is why a target of at least 80% is emphasized in guidelines.