St. Luke's Hospital in Chesterfield is partnering with the renowned Cleveland Clinic for cardiac care that will steer patients, research and the latest technology to the local hospital. Hospital officials announced the deal Tuesday at the west St. Louis County hospital and described the relationship as an exclusive affiliation with the Cleveland Clinic Heart and Vascular Institute. The five-year deal includes access to clinical trials, new technology, reviews of complex cases and continuing medical education, hospital officials said. They said other St. Louis area hospitals were approached. But after a year of conversations, St. Luke's was tapped to be the exclusive partner in the region.