DALLAS — Six weeks ago, 64-year-old Larry Rayes could only walk a few steps without resting. "I could only walk about 20 yards and I got very lightheaded, very dizzy," Rayes said. Rayes suffers from congestive heart failure, a condition caused by a heart so weak it can't effectively pump blood through his body. He needs a heart transplant, but until he gets one, Rayes is part of an experiment to ...
