Table 1.

Inclusion/exclusion criteria for both groups

Inclusion criteria:	VF/VT group	Asphyxia group
Initial rhythm	VF/VT	Asystole or PEA
Age	>18 years	>18 years
Core temperature	>30°C	>30°C
Measurement of PetCO2 values	Every minute in the first 10 minutes after intubation	Every minute in the first 10 minutes after intubation
Aetiology	Confirmed acute myocardial infarction and/or primary VF/VT (electrocardiogram, enzymes, electrophysiological studies)	Confirmed asphyxial cause (acute asthma attack, severe acute respiratory failure, tumor of the airway, suicide by hanging, acute intoxication, aspiration, foreign body in the airway)
Exclusion criteria:
CPR procedures	Successful defibrillation in the first cycle	VF or pulseless VT as the initial rhythm on the monitor
Aetiology	Acute myocardial infarction with asystole or PEA as the initial rhythm (autopsy or additional investigations in the hospital)	Acute myocardial infarction as a cause of arrest (autopsy or additional investigations in the hospital)