TY - CHAP M1 - Book, Section TI - Headache A1 - Naik, Pratiksha Desai A1 - Mollman, Matthew A2 - Stone, C. Keith A2 - Humphries, Roger L. PY - 2017 T2 - CURRENT Diagnosis & Treatment: Emergency Medicine, 8e AB - On an annual basis, headache as a presenting symptom to the emergency department (ED) accounts for about 2.2–4.5% of all ED visits. Less than 1% of these patients are found to have a life-threatening condition. The ability to quickly differentiate immediate, life-threatening etiologies from benign headaches relies heavily on a thorough history and physical examination. Understanding the underlying pathophysiology of headaches will also aid in risk stratifying patients who present with the complaint of headache. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1176287019 ER -