They are initials used in medicine. They correspond to Implantable Cardioverter Defibrillator ( 41 ICD; In English. In Spanish is cardioverter defibrillator Implantable ( DCI ). It is an implantable device in the body and is capable of cardioversion and desfibrilizaciones.
It is an acronym which corresponds to several meanings. For example, in English, industrial development certificate. Also Christian democratic international and advocate of individual defense, among others.