Sharon was hospitalized on 18 December 2005, after suffering a minor ischemic stroke. During his hospital stay, doctors discovered a heart defect requiring surgery and ordered bed rest pending a cardiac catheterization scheduled for 5 January 2006. Instead, Sharon immediately returned to work and suffered a hemorrhagic stroke on 4 January, the day before surgery. He was rushed to Hadassah Medical Center in Jerusalem. After two surgeries lasting 7 and 14 hours, doctors stopped the bleeding in Sharon's brain, but were unable to prevent him from entering into a coma. Subsequent media reports indicated that Sharon had been diagnosed with cerebral amyloid angiopathy (CAA) during his December hospitalisation. Hadassah Hospital Director Shlomo Mor-Yosef declined to respond to comments that the combination of CAA and blood thinners after Sharon's December stroke might have caused his more serious subsequent stroke.