Implantable cardioverter-defibrillators (ICDs) are apparently doing their jobs so well, they need to be able to do them for a longer period of time. According to researchers at the Minneapolis Heart Institute, patients with ischemic cardiomyopathy (ICM) and dilated cardiomyopathy (DCM) who have ICDs are outliving those devices by 1–3 years.  The researchers examined 1555...