Table 1 Indicators for initiation and cessation of CPR serving as basis for estimating the CPR interval according to vital signs and therapy documentation

Loss of SpO₂ signal

Cardiac defibrillation

i.v. epinephrine 1 mg

i.v. amiodarone 300 mg

HR < 30 /min

HR > 200 /min

Documented cardiac rhythm = VF, VT, ASY, or PEA

Sudden increase in F_iO₂ to 1.0

Death

Initiation of an ECMO therapy

Documented rhythm = SR, AF, or AFlut

Reduction of F_iO₂ from 1.0 to lesser values

Termination of lung ventilation