What is the emergency procedure used to maintain heart function and oxygen flow?

The emergency procedure used to maintain heart function and oxygen flow after cardiac arrest is cardiopulmonary resuscitation (CPR). CPR is a life-saving technique that combines chest compressions and rescue breaths to keep blood flowing and ensure oxygen reaches vital organs, particularly the brain and heart, until more advanced medical help can arrive. This procedure is crucial in emergencies where a person's heart has stopped beating effectively, such as during a heart attack or in some cases of drowning.

While other procedures mentioned might be relevant in different emergency situations, they do not specifically target the immediate need for heart function and oxygenation in the way that CPR does. For instance, defibrillation is an important technique used to restore a normal heartbeat but typically requires the use of a defibrillator and is performed after CPR has already been initiated. First Aid covers a broader range of medical emergencies, but it does not specifically focus on maintaining heart function and oxygen flow. Choking relief is a critical procedure when someone is unable to breathe due to an obstruction in the airway, but it does not address cardiac issues directly.