作者单位:Univ Calif Los Angeles, David Geffen Sch Med, Dept Cardiothorac Surg, Peter V Ueberroth Bldg,Suite[1]Univ Calif Los Angeles, David Geffen Sch Med, Diagnost Cardiovasc Imaging Lab, Peter V Ueberroth[2]Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Peter V Ueberroth Bldg,Suite 3371, Los[3]