A "long-standing" malpositioned pacing lead. Long-term follow-up after extraction.

Transvenous pacemaker (PM) catheters can be unintentionally placed in the left ventricle (LV) during the implantation procedure. An 8-year-old girl was discovered with a malpositioned pm wire, seven years after the implant. Trans-thoracic echocardiogram revealed the lead traversing the inter-atrial septum, crossing the mitral valve and embedded in the basal lateral wall of the LV. This is a report of a 14-year long follow-up after the surgical extraction of the malpositioned PM lead.