"The hospital with a serious heart problem," read the title of the story that aired on CNN's "Anderson Cooper 360 Degrees" last June, via reporting by senior medical correspondent Elizabeth Cohen. The target was St. Mary's Medical Center in West Palm Beach, Fla., a 464-bed facility with about 2,400 employees. The subject matter was explosive — children who'd died or suffered after undergoing cardiac surgery at the hospital. "We calculate that from 2011 to 2013, the death rate for open heart surgery on children at St. Mary's Medical Center was more than three times higher than the national average," noted Cohen in her report.