A method of treating a patient with a calcified aortic valve includes introducing a guide wire into a blood vessel. The guide wire is advanced through the aorta and the aortic valve. A balloon dilatation catheter is introduced into the blood vessel over the guide wire. The balloon dilatation catheter...http://www.google.com/patents/US8133213?utm_source=gb-gplus-sharePatent US8133213 - Catheter guidance through a calcified aortic valve
