Bluetooth Low Energy pacemakers demonstrate technical characteristics for remote signal detection and specific device identification.

“Years ago, my lab showed that cardiac implants could be detected and even reprogrammed without manufacturer equipment. While pacemakers today have largely closed those holes, rare circumstances with advanced radio frequency instrumentation and analysis of unintended radiated emissions below the abstraction layer of digital electronics may still allow proximity clues beyond what most manufacturers would assume is possible, using techniques more aligned with MASINT and ELINT than conventional medical device design.”

“Even if you were in range, the air is so crowded with signals from other Bluetooth devices that picking out one specific pacemaker would be like trying to hear a single voice in a noisy stadium.”