Resuscitation is the set of emergency actions taken to restore and maintain breathing and circulation in an unconscious person whose pulse or respiration has stopped. The main aim is to keep oxygenated blood flowing to the heart and brain long enough for advanced treatment to be given, reducing the risk of permanent organ damage.
Core components
Modern resuscitation combines several interrelated measures. Key elements include:
- Chest compressions to manually circulate blood.
- Ventilation or rescue breathing to supply oxygen.
- Defibrillation with an automated external defibrillator (AED) when a shockable heart rhythm is present.
- Airway management and, in advanced settings, medications and advanced life support techniques.
History and development
Contemporary cardiopulmonary resuscitation (CPR) emerged in the mid-20th century when chest compressions were combined with artificial ventilation. Over subsequent decades, guidelines evolved as evidence accumulated: compression depth and rate were standardized, and portable defibrillators became widely available. Training programs and public-access AED initiatives have further expanded community response capabilities.
When and why it is used
Resuscitation is indicated after cardiac arrest, which may follow a heart attack, drowning, choking, drug overdose, severe trauma, or sudden collapse. Early bystander intervention greatly improves survival odds: immediate recognition, prompt chest compressions, and rapid defibrillation are central to the "chain of survival." For more practical information see basic guidance and local training resources like certification courses.
Variations and training
There are distinctions between basic life support (BLS) provided by lay rescuers and advanced cardiac life support (ACLS) delivered by healthcare professionals. Some protocols emphasize hands-only CPR for untrained bystanders, while trained responders perform combined compressions and ventilations. Hands-only options and AED use are covered in many public programs — see community programs and equipment guidance.
Important considerations
Resuscitation carries risks such as rib fractures but the potential benefit of saving life typically outweighs these harms. Outcome depends on rapid action and the underlying cause. For clinical details and regional guidelines consult professional recommendations and educational materials at training providers.