Medtronic Inc. (MDT)’s Reveal XT, a tiny heart monitor that’s inserted under the skin on the chest, detects more potentially deadly erratic heart rhythms in stroke patients than standard approaches, a company-funded study found. The results suggest a better way to find the cause of thousands of strokes in the U.S. each year, said Richard Bernstein, a professor of neurology at Northwestern University Feinberg School of Medicine in Chicago. While the irregular heart rhythm called atrial fibrillation is one cause, the reason for more than one-quarter of the 800,000 strokes a year is unknown, the Centers for Disease Control and Prevention said.
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