Reconstruction or repair of a blood vessel, which includes the widening of a pathological narrowing of an artery or vein by the removal of atheromatous plaque material and/or the endothelial lining as well, or by dilatation (BALLOON angioplasty) to compress an ATHEROMA. Except for endarterectomy, usually these procedures are performed via catheterization as minimally invasive endovascular procedures.