After discovering no pulse during rescue breathing, what is the next immediate action?

When you discover that a person has no pulse during rescue breathing, it is crucial to recognize that the individual is in cardiac arrest. The immediate action should be to begin CPR and activate the AED (Automated External Defibrillator).

Starting CPR is essential because it helps circulate oxygenated blood to vital organs, particularly the brain and heart, which are at risk of irreversible damage within minutes. CPR involves chest compressions and rescue breaths, which provide a combination of circulation and oxygenation. Turning on the AED is also important because this device can analyze the heart's rhythm and provide defibrillation if necessary, which can restore a normal heart rhythm and increase the chance of survival.

In contrast, stopping CPR and waiting for help would not assist the patient. Continuing only with rescue breathing without compressions fails to provide effective circulatory support. Calling emergency services again might not provide immediate assistance and can delay critical life-saving measures needed right away.

Thus, promptly starting CPR and using the AED maximizes the chances of survival until advanced medical help arrives.