Amanda Barefoot’s life changed this past August when she woke up with the sensation of her head spinning and numbness in her fingers and toes. She went to a hospital, where she was treated for high blood pressure and abnormal lab work…

Kendall Boyd was leaving work in Columbia, S.C., when he realized he still had the keys to his work truck in his pocket. After walking back to his office to return them, he “blacked out.” His co-workers immediately called EMS…