A manual defibrillator is a medical device used by healthcare professionals to deliver a controlled electrical shock to the heart in cases of life-threatening arrhythmias, such as ventricular fibrillation or pulseless ventricular tachycardia. Unlike automated external defibrillators (AEDs), manual defibrillators require the user to interpret the patient's cardiac rhythm and decide on the appropriate energy level for the shock.
