Description :- Biphasic defibrillator gives bilateral current as to be positive and negative after its electrical energy is discharged. Namely, it conducts electrical current bilaterally. On the first phase, current flows from one electron to the other as it is in monophasic defibrillator. On the second phase, current starts to flow on reverse direction. According to the studies done, it is observed that biphasic waves produce more successful defibrillation with lower energy than monophasic waves and so they are less harmful. In addition, since same results can be obtained with low energy use, some adverse effects such as burns are also reduced.