A recent study by Salcido et al. (2010) ascertained<unk>  in all initial and<unk>  rhythms treated by any level of Emergency Medical Service (EMS), finding a<unk>  rate of 36% and a lower but not significantly different rate of survival to hospital discharge in cases with<unk>  compared to those without<unk> .
Rearrest
Traction 
Bed rest
Decompression 
Trifascicular block
Remote ischemic conditioning
Nerve induction
High-frequency ventilation