The present invention provides an aortic valvuloplasty catheter which, in one preferred embodiment, has a tapered distal balloon segment that anchors within the left ventricle outflow track of the patient's heart and a rounded proximal segment which conforms to the aortic sinuses forcing the valve leaflets...http://www.google.de/patents/US7618432?utm_source=gb-gplus-sharePatent US7618432 - Valvuloplasty devices and methods
