RESULTS	The lowest successful defibrillation energy with the biphasic waveform was less than , equal to , or higher than with the monophasic waveform in 64 % , 28 % , and 8 % of patients , respectively , and on average significantly lower with the biphasic waveform for all three lead configurations ( A : 11.3 + / - 4.4 J vs 14.5 + / - 4.5 J ; B : 9.7 + / - 4.7 J vs 15.1 + / - 4.5 J ; C : 7.9 + / - 4.5 J vs 12.4 + / - 4.9 J ) .\