http://www.npr.org/templates/story/s...toryId=6718704
Two drugs long prescribed to treat Parkinson's disease have been linked to heart-valve problems. Two studies in this week's New England Journal of Medicine present strong evidence that the drugs cause scarring of heart valves in nearly 30 percent of Parkinson's patients.
Some patients require surgery to replace leaky valves, which can result in heart failure and even death.