2010 (No Change From 2005): Data from both outof-hospital
and in-hospital studies indicate that biphasic
waveform shocks at energy settings comparable to or lower
than 200-J monophasic shocks have equivalent or higher
success for termination of VF. However, the optimal energy
for first-shock biphasic waveform defibrillation has not been
determined. Likewise, no specific waveform characteristic
(either monophasic or biphasic) is consistently associated with
a greater incidence of ROSC or survival to hospital discharge
after cardiac arrest