MSRA-1111

A 43-year-old patient presents to the emergency department with complaints of feeling generally unwell. He reports experiencing body aches and waking up in a cold sweat at night. Upon examination, you observe injection marks on the antecubital fossa. His vital signs reveal a temperature of 38.1ºC, heart rate of 122 bpm, blood pressure of 110/90 mmHg, respiratory rate of 18/min, and oxygen saturation of 98%. You urgently order blood cultures and an echocardiogram. Based on the diagnosis, which site is most likely affected?