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Los Angeles, California, May 15, 2012 - Patient Betty Jean Trusel undergoes an Aortic Valve Replacement under the direction of Alfredo Trento, MD, Director, Cardiothoracic Surgery Division at Cedar-Sinai Heart Institute. Dr. Trento guided the surgery using a Da Vinci Robot. Ms. Trusel' s mitral valve was too large and was flailing restricting the flow of blood.