Individuals with moderate to severe obstructive sleep apnea were found to have slightly larger ascending aortic diameters and thus may be at a heightened risk of cardiovascular events, according to an analysis of a national, multisite research study presented at the annual meeting of the Associated Professional Sleep Societies. “Sleep apnea severity is associated with increased thoracic aortic size, particularly in women,” Dr. Younghoon Kwon, assistant professor of cardiovascular medicine at the UVA Health System, said in presenting the results.