#912228Leo Bokeriya, second left, head of the Bakoulev Center for Cardiovascular Surgery, after a heart valve replacement surgery. The heart valve implant was made of animal biomaterial.Sign in or register,to downloadAdd to cartRemove from cartPackage: Heart valve replacement surgeryCategories: HealthLocation: Moscow, RussiaEvent date: 19.05.2011Date published: 19.05.2011Author: Mikhail FomichevCredit: SputnikSource: SputnikOriginal: DigitalMedia: JPEG, 4896x3264px, 3Mbhealthcaresurgery