Medtronic Extravascular ICD system is a first-of-its-kind implantable defibrillator, designed to avoid certain risks of traditional, transvenous ICDs because its lead (thin wire) is placed outside the heart and veins, under the sternum (breastbone). The system offers anti-tachycardia pacing (ATP), pause prevention pacing, and a device similar in size, shape, and battery longevity to transvenous ICDs. Using a minimally invasive approach, the device is implanted below the left armpit (in the left mid-axillary region).