COVIDIEN CADENCE PHILIPS HEARTSTART PEDIATRIC AED PADS (M3504A). Medi-Trace™ Cadence Defibrillation Electrodes employ an unique silver/silver chloride design resulting in a more uniform distribution of current during defibrillation, pacing and cardioversion. These electrodes incorporate radiotransparent wires to provide a clearer view of the patient during x-ray as well as long lead wires to facilitate easier patient positioning. 2/PK 5PK/CS. Price per pack.