Each year in the United States, there are more than 800,000 strokes, according to the National Institutes of Health. Every 40 seconds, someone in the United States has a stroke, and every four minutes someone dies of stroke, according to the Centers for Disease Control and Prevention. Yet, medical studies have found that about 9% of patients who presented to emergency departments with strokes were initially misdiagnosed or received a delayed diagnosis. In cases where patients presented with mild, nonspecific or transient neurological complaints, such as comorbid headaches and vertigo, a 2017 study found that misdiagnosis ranged from 24 to 60%.