“A study published this month in a medical journal shows that while interrogators of passive RFID tags do cause some electromagnetic interference to implantable pacemakers and implantable cardioverter-defibrillators (ICDs), the devices pose no urgent health risks. However, the study’s authors believe that the “continued proliferation of RFID without taking implantable pacemaker and ICD EMC into consideration could potentially cause clinically significant events for patients”.”
Article
Mary Catherine O’Connor, RFID Journal, 8 January 2010
Article (Seidman 2010)

