The patient, male, 65 years old, underwent CRTD implantation in 2011. In March 2013, the skin outside the CRTD implantation broke down, resulting in recurrent infection of the capsule bag with local redness, swelling and pus, which improved after debridement and pacemaker disinfection. Admission diagnosis: 1. pathological sinus node syndrome III degree AVB CRTD post-implantation pacemaker bag infection with rupture 2. coronary artery disease old myocardial infarction post-coronary artery bypass PCI post-implantation cardiac function grade 2 3. type 2 diabetes mellitus diabetic nephropathy chronic renal insufficiency 4. cerebral infarction , admission l cardiac ultrasound: LVd 54.6mm LA30mm RV14.4mm EF 30% left ventricular enlargement, abnormal left ventricular segmental contraction . The patient was pacemaker dependent, and the temporary pacing electrode was first implanted via the right femoral vein for protective pacing; during the operation, the necrotic tissue and purulent secretions around the capsular bag and electrode lead were cleared and the pacemaker was removed. A straight wire was placed in the left ventricular electrode to the head end of the electrode, and the electrode was removed from the target vein directly and smoothly by hand, but the head end of the electrode was obstructed at the superior vena cava. A straight wire was placed inside the atrial electrode to the head end of the electrode, and the atrial electrode was removed directly by hand. The right ventricular spiral defibrillation electrode had a straight wire placed in it to the head end of the electrode, and the tail end spun out smoothly from the myocardium and was obstructed by adhesion of the defibrillation coil to the surrounding tissues in the superior vena cava. To remove it with the aid of an adjunctive device, a matching locking wire is inserted into the tail end of the right ventricular spiral defibrillation electrode, fed to the head end of the electrode lead, and the locking wire is released so that the electrode and the locking wire are firmly connected to prevent the wire from detaching from the electrode; a matching dilating sheath is then selected to ensure that the locking wire remains in tension. The right ventricular spiral defibrillation electrode was successfully removed by advancing the locking wire and electrode toward the electrode tip and peeling off the adhesions between the upper chamber defibrillation coil and the surrounding tissue. Finally, another attempt was made to remove the left ventricular electrode, but the left ventricular electrode was still obstructed and could not be removed through the subclavian vein. The left ventricular electrode was still significantly obstructed and could not be extracted through the subclavian vein.