Balloon Aortic Valvuloplasty Performed Without Heparin to Decrease Vascular and Bleeding Complications of the Procedure

Inclusion Criteria: * be over 18 * carry a tight and symptomatic aortic stenosis * have an indication for a ballon aortic valvuloplasty * Subject have signed his written informed consent Exclusion Criteria: * Have an absence of femoral surgical approach * have a criticial hemodynamic state, considered as outdrove for the treatment * have a severe aortic failure * allergia to heparin * contraindication to heparin or/and local anaesthetic * be treted by low molecular weight heparin in less than 12 hoursbefore the intervention or by standard heparin in less than 4 hours before the valvulopasty * have a tight but not symptomatic aortic stenosis