Unusual case of late dislodgment of a superior vena cava coil.

Key Teaching Points•When implantable cardioverter-defibrillator (ICD) system parameters are out of range, or failure to defibrillate is seen, search for ICD system reprogramming options before jumping to reoperation.•Look carefully at all diagnostic testing obtained in patients with implanted devices, even when the indication for the diagnostic study had nothing to do with the device.•Implant superior vena cava (SVC) coils somewhat distally, leaving part of the coil in the SVC to avoid proximal dislodgment. •When implantable cardioverter-defibrillator (ICD) system parameters are out of range, or failure to defibrillate is seen, search for ICD system reprogramming options before jumping to reoperation.•Look carefully at all diagnostic testing obtained in patients with implanted devices, even when the indication for the diagnostic study had nothing to do with the device.•Implant superior vena cava (SVC) coils somewhat distally, leaving part of the coil in the SVC to avoid proximal dislodgment.