Editor's Note: Dr. Sanjay Gupta is blogging at CNN.com/Health on what helped Congresswoman Gabrielle Giffords survive the shot to the head The University Medical Center in Tucson is expected to give an updated diagnosis on Congresswoman Gabrielle Giffords, who was shot in the head after an attack on Saturday, later this morning. But on American … Continue reading Chief of neurosurgery: Rep. Giffords is "holding her own"