Key result
Synchronizing defibrillation to VF upslope vs downslope improves success from ~39% to 67%.
Why the study?
There is no agreement on the amount of energy that can be saved by timing internal defibrillation shocks to morphological patterns in ventricular fibrillation or whether implantable defibrillators can time shocks to these periods.
Does synchronizing defibrillation shocks to the upslope of coarse ventricular fibrillation electrograms reduce energy requirements compared to random shocks?
Does synchronizing defibrillation shocks to the upslope of coarse ventricular fibrillation electrograms reduce energy requirements compared to random shocks?
Absolute Event Rate: 67% vs 39%
p-value: p=<.001
Synchronizing internal defibrillation shocks to the upslope of coarse ventricular fibrillation electrograms significantly lowers the energy requirement for successful defibrillation.
No takes yet. Share an insight, caveat, or question.
May lower defibrillation energy needs in coarse VF; leaves open translation to human practice.
Hsu et al. (1998) studied Ventricular fibrillation. Synchronized defibrillation shocks to the upslope of coarse VF vs. Shocks delivered to the downslope or randomly was evaluated on Successful defibrillation (p=<.001). Synchronizing defibrillation shocks to the upslope of coarse ventricular fibrillation improved success compared to downslope delivery (67% vs 39%, P<0.001) and lowered energy requirements.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: