As the population ages, the use of pacemakers is growing, with roughly five million patients worldwide who currently are implanted with a pacemaker or implantable cardioverter-defibrillator. At the same time, the use of MRI as a diagnostic tool is increasing, with nearly 30 million scans completed in 2007. People over age 65 are twice as likely to need an MRI compared to younger patients and between 50% and 75% of patients with electronic heart devices will likely need an MRI at some point. This could lead to complications in these patients. (Medical Device Daily)