The American Heart Association and the American College of Cardiology are responding to concerns about a new risk calculator designed to assess which patients should take cholesterol-lowering statin drugs. Harvard professors Dr. Paul Ridker and Dr. Nancy Cook said the tool has serious flaws and significantly overestimates a patient's risk of heart attack and stroke. Officials at the ACC and AHA defended the tool, saying Ridker and Cook's analysis of the calculator was based on three studies whose participants were in better health and younger than average. The PCNA has endorsed the new AHA/ACC guidelines.

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