Implantable defibrillators are implanted into the chests of patients prone to suffering ventricular fibrillation, a potentially fatal heart condition. Critical components in these devices are aluminum electrolytic capacitors, which store and deliver one or more life-saving bursts of electric charge to...http://www.google.com.au/patents/US6385490?utm_source=gb-gplus-sharePatent US6385490 - Capacitors with recessed rivets allow smaller implantable defibrillators
