Automated external defibrillator

An automated external defibrillator configured to automatically execute a defibrillation process of delivering an electric shock for defibrillation to a heart of a subject, the automated external defibrillator comprising:

• a power supply operating portion for turning on or off a power supply of the automated external defibrillator;
• a processor;
• and
• a memory that stores a computer-readable instruction that when executed by the processor, causes the automated external defibrillator to perform operations comprising:
• receiving a physiological signal of the subject through an electrode pad;
• determining whether the defibrillation process is necessary based on the physiological signal;
• determining whether the electrode pad is attached to the subject;
• determining whether an operation for turning off the power supply has been performed on the power supply operating portion, and
• based on a determination that the defibrillation process is necessary, a determination that the electrode pad is attached to the subject, and a determination that the operation for turning off the power supply has been performed on the power supply operating portion, cancelling the defibrillation process while maintaining an on-state of the power supply of the automated external defibrillator.