1980
The first ICD (Implantable Cardioverter Defibrillators) -- weighing 9 ounces and about the size of a deck of cards -- was implanted into a human patient. First conceived in 1960 by Polish-born doctor Michel Mirowski after his mentor died of a heart arrhythmia, the ICD was developed as an alternative to drugs and surgery for the treatment of arrhythmia.