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
One week after an aortic valve replacement surgery, a 55-year-old man is brought to the emergency room 30 minutes after the onset of severe, sharp chest pain. He appears pale and dyspneic but is alert, oriented, and speaks in full sentences. His temperature is 38°C (100.4°F), pulse is 192/min and thready, respirations are 22/min, and blood pressure is 80/50 mm Hg. Faint rales can be heard in the lower lung fields on both sides on auscultation. There is a midline thoracotomy scar with mild reddening but without warmth or discharge. A portion of an ECG is shown. The pattern remains unchanged after 1 minute. Which of the following is the most appropriate intervention?
assistant
Synchronized cardioversion