Description: FRIDAY, July 27 (HealthDay News) -- Exposure to the defoliant herbicide Agent Orange during the Vietnam War may be raising blood pressure levels for the aging veterans of that conflict.

That's the biggest change in the latest of a series of reports from the U.S. Institute of Medicine on the long-term health effects of Agent Orange. The report was released Friday.

The IOM's Committee to Review the Health Effects in Vietnam Veterans of Exposure to Herbicides last issued its updated findings in 2005; this report is based on data collected up to 2006. The reports are compiled at the request of the U.S. Department of Veterans Affairs.

"In two new studies, Vietnam veterans with the highest exposure to herbicides exhibited distinct increases in the prevalence of hypertension; the prevalence of heart disease was also increased," the report found, although the IOM committee stopped short of suggesting that wartime exposure to Agent Orange is currently raising veterans' risk of ischemic