Subclavian crush syndrome may occur when the lead from the cardiovascular implantable electronic device (CIED) is trapped between the clavicle and the first rib, the insulation layer is damaged, or the conductor has been fractured. This complication carries an even greater risk if it involves a defibrillation electrode.
Case reportWe describe a case of a 68-year old male patient with a sudden onset of Implantable cardioverter defibrillator(ICD) activation-shocks delivery, more than ten times in the period of two hours, right before admission to the emergency unit department. His ECG on admission shows the rhythm of the pacemaker with normal ventricular capture.The device interrogation revealed 53 episodes of ventricular fibrillation-false detection and delivery of multiple inappropriate shocks. Low impedance was detected of pace/sense electrodes<200Ω, rise in shock impedance, ventricular oversensing episodes, and high pacing threshold. Due to InappropriateICD therapy, the detection was turned off.Radiography findings have shown interruption of electrodecontinuity in a position corresponding to subclavian crush syndrome, thereby implantation of the new system was indicated. The intervention of a new system implantation was performed without any complication in a standard procedure, using the left axillary vein approach.We inserted a new ventricular single coil defibrillation electrode and a new ICD device. The patient was discharged in good clinical condition.Physicians must demonstrate an excellent understanding of lead designs, the mechanism of lead fracture, diagnosis, and management, in order to make the best decision for every individual patient. Inappropriate shocks are a medical emergency and must be treated immediately. Individual approaches for each patient should be mandatory.