ABCNews -- It's been about six weeks since Frank Aylor had open heart surgery, and he's already up and jogging again. "I'm not the type that likes to sit at home, I like to be at work," Aylor said. Fortunately for Aylor, only one month after his heart bypass surgery at Vanderbilt University Medical Center in Nashville, Tenn., he was able to return to work. "I'm amazed, people at work are amazed, they can't believe that I had open heart surgery a month ago," he said. Vanderbilt's approach to this type of surgery is not the typical one. While about 80 percent of bypass surgeries done nationwide are performed with the patient on a heart and lung machine -- an approach called an "on-pump" bypass -- 95 percent of the bypass surgeries done at Vanderbilt...