DALLAS, Texas, July 12 [Category: Health Care] -- The American Heart Association posted the following news release: * * * Bacteria from gum disease may cause inflammation, harden heart valves * Research Highlights : * A lab study investigating mouse and human cardiac tissue found a potential link between gum disease (periodontitis) and a narrowing of the aortic valves (aortic valve stenosis). * Currently, there is no medication or treatment available that can prevent or slow the progression of aortic valve stenosis. * However, thes more PR