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An early chapter of this book begins with a scenario that is played out every day in emergency rooms throughout the country:
A patient has arrived who had a sudden onset of aphasia and right hemiparesis three hours before. A CT scan of the brain is performed; perhaps an MRI scan is done if that is fortuitously available on short notice. The scans are normal. Since normal scans are consistent with the diagnosis of acute ischemic infarction at three hours, this clinical diagnosis is made. The patient is admitted to the hospital, the lesion is allowed to ripen for several. . . [Full Text of this Article]
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