Heart Beat: Heart-health questions stump many

Do you know your blood pressure? Do Americans get most of their sodium from table salt? Is sea salt a low-sodium alternative to table salt? If you answered yes, no, and no, give yourself a gold star. Your fellow Americans, though, didn't do quite as well on these questions, all part of an American Heart Association poll.

Among the 1,000 people who completed the poll in March 2011:

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