Better blood test may spot heart attack faster.
A new blood test can help emergency room doctors more quickly determine whether patients with chest pain are having a heart attack. The test is a more sensitive version of one that emergency physicians have been using. The conventional troponin test takes three hours, the high-sensitivity version can give results in less than an hour. High-sensitivity troponin tests have been available in Europe and elsewhere for years. But the first such test in the United States was just approved last year.
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