FCEM2-0889
A 42 year old male is brought to the emergency department by a friend due to concerns the patient has been experiencing fever and increasing lethargy. The patient is known to be an intravenous drug user. The patient is found to have a high-pitched systolic murmur and crepitations in both lung bases. The following observations are noted:
Temperature: 38.8ºC
Pulse rate: 116 bpm
Blood pressure: 110/68 mmHg
Respiration rate: 22 bpm
Oxygen saturation: 96% on room air
What is the most likely diagnosis?