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KRWG News for Tuesday, July 18 at 6:45 a.m.

Brain scans using Amyvid dye to highlight beta-amyloid plaques in the brain. Clockwise from top left: a cognitively normal subject; an amyloid-positive patient with Alzheimer's disease; a patient with mild cognitive impairment who progressed to dementia during a study; and a patient with mild cognitive impairment.

In health news, a new study suggests that a heart attack might put you at risk for cognitive decline at a faster rate than usual as you age.