system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 35-year-old man is brought to the emergency department 20 minutes after being involved in a motor vehicle collision in which he was a restrained passenger. The patient is confused. His pulse is 140/min and blood pressure is 85/60 mm Hg. Examination shows a hand-sized hematoma on the anterior chest wall. An ECG shows sinus tachycardia. Which of the following structures is most likely injured in this patient?
assistant
Aortic isthmus