iPods can cause cardiac implantable pacemakers to malfunction, according to a study presented by a 17-year-old high school student to a meeting of heart specialists at Michigan State University this week. “The study tested the effect of the portable music devices on 100 patients, whose mean age was 77, outfitted with pacemakers,” reports Reuters. “Electrical interference was detected half of the time when the iPod was held just 2…