In the event of cardiac arrest, you must immediately call emergency services (15/112), begin chest compressions, locate a defibrillator, and ideally alternate 30 compressions with 2 rescue breaths (the latter being optional) until emergency services arrive.

noli's read

This advice is perfectly aligned with international resuscitation guidelines (ERC - European Resuscitation Council). Scientific literature, particularly via meta-analyses and large-scale observational studies, confirms that immediate cardiopulmonary resuscitation (CPR) by bystanders doubles or triples the chances of survival. Hands-only CPR is recognized as an effective method for untrained bystanders, which validates the 'optional rescue breaths' aspect to facilitate rapid action. The early use of an automated external defibrillator (AED) is also supported by strong evidence as the determining factor for restoring a normal heart rhythm. The approach is pragmatic: reducing the wait time before the arrival of emergency services is the primary lever for survival. There is no exaggeration here, only a precise popularization of protocols validated by emergency medicine.

the sources

No named source held this one up — that absence is part of the verdict.