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A 67-year-old man comes to the emergency department with low-grade fevers and fatigue. He has no history of heart disease. His temperature is 38.4 C (101.1 F) , blood pressure is 117/76 mm Hg, pulse is 82/min, and respirations are 14/min. On examination, there is a diastolic murmur at the left sternal border. He has nontender erythematous macules on his hands and feet. Blood cultures show gram-positive cocci that are catalase-negative and able to grow in hypertonic (6.5%) saline and bile. This patient's medical history is most likely to include which of the following procedures within the past month?
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