There was no significant difference in ICU transfer between the 2 groups (eTable 10 in Supplement 1). This could be explained by the fact that ICU transfer was not necessarily within the pathway downstream from ventricular arrhythmia or cardiac arrest. Patients were transferred to the ICU after a ventricular arrhythmia or cardiac arrest only if they were designated to receive all resuscitation procedures, had a witnessed event with prompt start of cardiopulmonary resuscitation, and achieved return of spontaneous circulation.