A Case Report of Myocardial Infarction Complicated With Blood Pressure Fluctuations Caused by Pheochromocytoma.

Emergency medicine achieved recognition as an independent medical specialty in 1979 by the American Board of Medical Specialties, following establishment of the first residency program in 1972. Research output in this discipline has expanded continuously since formal recognition. Psychiatry represents a substantial component of emergency medicine research activity, driven by increasing psychiatric presentations to emergency departments. Psychiatric emergencies comprise acute disturbances in cognition, behavior, or mood requiring immediate intervention to prevent harm. These presentations include suicidal ideation and attempts, acute psychosis, severe mood episodes, substance-related emergencies, and behavioral crises. Emergency departments have assumed increasing responsibility for psychiatric care due to multiple factors including reduced psychiatric inpatient capacity, fragmentation of outpatient mental health services, and insurance-related barriers to care. Recent developments have emphasized the importance of this intersection. In 2025, the American Board of Medical Specialties approved focused practice designation in emergency behavioral health, and the Substance Abuse and Mental Health Services Administration published guidance recognizing emergency behavioral health centers as essential components of crisis care systems. These developments reflect growing recognition of emergency psychiatry as a distinct practice area requiring specialized knowledge and skills.