How susceptible or possibly interfering is the RF of a St. Jude ICD CD3231-40 implanted device near Bluetooth devices when remote device transmit and receive signals are in process? Is this a limiting consideration for heart patients with these models of devices? Recommendations for connecting and working with Bluetooth devices are that no other radio frequency devices be nearby or within the range of Bluetooth devices in question. Basic short distance for PC to Bluetooth devices seems to begin at 33 feet and goes up from there to 3,600 or more feet for more powerful Bluetooth signals.