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 67-year-old woman comes to the emergency department because of a 4-month history of fatigue, shortness of breath with exertion, and dizziness. She has a history of atrial fibrillation and had a single-chamber pacemaker placed five years ago after an episode of syncope. Her pulse is 66/min and blood pressure is 98/66 mm Hg. An x-ray of the chest is shown. The x-ray confirms termination of the pacemaker lead in which of the following structures?
assistant
Right ventricle