During the initial implant procedure, there was unstable pacing lead impedance (pli) and capture threshold noted on the left ventricular (lv) lead.Diagnostic imaging revealed that the lead had dislodged and caused a coronary sinus dissection.An echo-cardiogram was performed and there was a pericardial effusion noted which led to a cardiac tamponade.The patient¿s condition was worsening, so the effusion was drained, and the procedure was abandoned.An attempt was made to explant the lead at a later date, however after pulling the lead back, the physician was able to find adequate electrical measurements.The lead remains implanted and the patient was stable following the procedure.Clinical study patient id: (b)(6).
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