U.S. researchers have found that heart patients who get their defibrillator from a doctor who specializes in the heart's electrical system fare better than those whose devices are implanted by doctors of other specialties. Implantable heart defibrillators (ICDs) are implanted under the skin with wires leading to the heart. They are designed to detect deadly heart rhythms and shock the heart back to normal, saving a patient from cardiac arrest. In a recent study, scientists compared data on more...