The Associated Press ORLANDO, Fla. — A new generation of tiny, drug-coated metal scaffolds that prop open arteries has transformed heart care and is allowing a growing number of people to avoid bypass surgery. The devices, called drug-coated stents, release medication that prevents vessels from reclogging after procedures to open them up. At an American College of Cardiology conference on Sunday, doctors reported that both brands sold today are equally good at keeping blood flowing smoothly, although one might be better for diabetics. Both were vastly better than the plain metal ones that were standard just a few years ago....