This is a neat party trick I picked up on CCU.  Now when a patient comes in with  pacemaker malfunction/chest pain/syncope and needs a Cardiology workup and admission, but hasn’t been able to locate their pacemaker card since the mid 90’s, you can look like a pro and know the device manufacturer from CXR alone (which is something we get anyway on anyone who remotely looks like they might need Cardiology).

Paper and algorithm can be found here:

http://www.ianchristoph.com/physician-resources-2/device_id.pd