A Biphasic Defibrillator is a medical device used to restore a normal heart rhythm in patients experiencing life-threatening cardiac arrhythmias, such as ventricular fibrillation or pulseless ventricular tachycardia. It delivers a controlled biphasic electrical shock, in which the current flows in two directions, making defibrillation more effective while requiring less energy than monophasic defibrillators. The device is equipped with a clear display, ECG monitoring, rechargeable battery, and user-friendly controls for rapid emergency response. Biphasic defibrillators are widely used in hospitals, emergency departments, intensive care units (ICUs), ambulances, and cardiac care centers. They support both manual and automated external defibrillation (AED) modes, depending on the model, and include safety features such as audible and visual alarms. Many models also provide synchronized cardioversion and external pacing functions for advanced cardiac care. The device helps improve survival rates by delivering quick and effective treatment during cardiac emergencies. Regular inspection, battery checks, electrode replacement, and performance testing are essential to ensure reliable operation. Biphasic defibrillators play a critical role in emergency cardiac care and are an essential part of modern life-saving equipment.