VITAL SIGNS Treatments: Artery Cleanup Misses Its Mark A common bacterium has been found in the plaque that builds up in the coronary arteries, and infection with it may be linked to cardiovascular illness. With that in mind, researchers suspected that giving heart patients an antibiotic to knock out the bacterium might reduce their risk of more cardiac problems. But, the drugs do not seem to help at all, two new studies in The New England Journal of Medicine report. "The testing of these agents for the treatment of advanced coronary heart disease appears to be at the end of...