Pacemakers and ICD leads are inserted through veins that travel to the heart and the ends of the leads are positioned inside the heart. Over time, scar tissue and adhesions can form causing the leads to become attached to the veins and heart muscle. Lead extraction is a procedure where the leads are removed using specialized tools that can free the leads from the scar tissue and adhesions. This can often be performed non-invasively through the pacemaker or ICD implant site using a laser or cutting tool. Lead extraction is a safe and effective procedure when it is performed by an experienced team.