Table 1. Clinical and demographic characteristics of the adult patients with cardiac arrest and survival 24 hour outcome, stratified according to initial arrest rhythm and ultrasonographically detectable cardiac activity.

VF:ventricular fibrillation, pVT:pulselessventricular tachycardia, PEA: pulseless electrical activity, CPR: Cardiopulmonary resuscitation, USG: Ultrasonography, ROSC: return of spontaneous circulation, * Statistically significant, α=0.01, ^a: Indicates statistically different group based on VF/pVT, ^b: Indicates statistically different group based on PEA, ^c: Indicates statistically different group based on Asystole.