In a preliminary study of 152 people, the test correctly identified 98% of those who had had an ischemic stroke and 86% of those who hadn't had one. Ischemic stroke is the most common type of stroke. It occurs when a clot blocks blood flow in the brain.
The test measures levels of a brain chemical called glutamate. When blood flow to the brain is impaired, glutamate is rapidly released into the bloodstream, says researcher Kerstin Bettermann, MD, PhD, associate professor of neurology at Penn State College of Medicine in Hershey."
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