A University of Iowa study raises questions about the four-point-six billion dollars spent every year nationwide on certain types of devices for heart patients. Study lead author Doctor Peter Cram, a U-of-I internal medicine professor, says many older Americans are getting livesaving devices called I-C-Ds, implantable cardioverter defibrillators. Radio Iowa (http://www.radioiowa.com/gestalt/go.cfm?objectid=321BA43B-B1A8-4C4F-8A653F0C31A50CA7&dbtranslator=local.cfm)