TO PREVENT ISCHEMIC STROKE: Three types of measures should be taken: correction of the vascular risk factors, administration of antithrombotic agents and carotid revascularisation in patients selected on the basis of clinical and imaging criteria. CAROTID REVASCULARISATION MEASURES: The optimal indications are carotid surgery for severe symptomatic stenosis, while the benefits are marginal in severe asymptomatic stenosis and in moderate symptomatic stenosis. INDICATIONS FOR PERCUTANEOUS ANGIOPLASTY WITH PLACING OF AN ENDOPROSTHESIS: Angioplasty with endoprosthesis, a possible alternative to surgery, must be restricted to symptomatic stenosis either in randomised studies or in severe stenosis in patients in whom surgery is technically contraindicated.