A small study suggests using biphasic rather than monophasic shocks will increase the chances of achieving sinus ... Results of biphasic vs monophasic waveforms for atrial-flutter cardioversion.

Improving Immediate Cardioversion Success. ... [72,73] Biphasic shocks have a higher success rate than monophasic, with lower energy, lower current, and less skin and muscle damage.

The mean energy used for cardioversion using the two services was 117 J and 242 J, respectively (P <0.0001); the new service used a biphasic defibrillator rather than a monophasic defibrillator.