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Table 1 Criteria of the BLS-TOR and KoCARC BLS-TOR rules

From: External validation of multimodal termination of resuscitation rules for out-of-hospital cardiac arrest patients in the COVID-19 era

TOR rules Witness status Initial prehospital rhythm Prehospital shock Prehospital ROSC Others
Based on prehospital criteria
 International BLS rule8 not witnessed by EMT   no prehospital shock no prehospital ROSC  
 International ALS rule8 not witnessed by bystander/EMT   no prehospital shock no prehospital ROSC no bystander CPR
 Goto’s TOR rule13 not witnessed by bystander Initial non-shockable rhythm   no prehospital ROSC  
 KoCARC TOR rule I 7 not witnessed by EMT asystole in prehospital conditions no prehospital shock no prehospital ROSC  
 KoCARC TOR rule II not witnessed by EMT   no prehospital shock no prehospital ROSC Age > 60
 KoCARC TOR rule III not witnessed by EMT asystole in prehospital conditions no prehospital shock no prehospital ROSC Age > 60
 New TOR model 111 not witnessed by bystander asystole in the field   no prehospital ROSC  
Based on prehospital and ED
 SOS-KANTO’s TOR rule14 not witnessed by bystander asystole in the field    asystole in the hospital
 New TOR model 2 not witnessed by bystander    no prehospital ROSC asystole in the hospital
  1. ALS advanced life support, BLS-TOR basic life support and termination of resuscitation, CPR cardiopulmonary resuscitation, EMT emergency medical technicians, KoCARC Korean Cardiac Arrest Research Consortium, ROSC return of spontaneous circulation, SOS-KANTO survey of survivors after cardiac arrest conducted in the Kanto area in 2012 (2017)