DALLAS, Texas, Oct. 21 [Category: Health Care] -- The American Heart Association issued the following news release: Guideline Highlights: Each year in the U.S., over half a million people have a first stroke; however, up to 80% of strokes may be preventable. The new primary prevention of stroke guideline from the American Stroke Association urges health care professionals to screen people for stroke risk factors, including high blood pressure, elevated cholesterol, high blood sugar and obesit  more