An electrical conductor designed to be applied to an adult and/or paediatric patient for automatic or manual defibrillation, external pacing, cardioversion, and electrocardiographic monitoring through transmission of cardiac bioelectric signals (typically from the thoracic surface) to devices that record/process the signals and potentially return electrical impulses [e.g., electrocardiograph, electrocardiographic monitor(s), defibrillator]. It is a disk-like electrode that is affixed to the skin with a special adhesive and a conductive gel (pre-gelled). It may be made of x-ray translucent materials and may include permanently attached lead wires. This is a single-use device.