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 43-year-old gentleman with a history of intravenous drug use presents with general fatigue and weakness accompanied by swelling in his ankles and lower legs. Further questions elicit that he has had many infections due to his drug use but has not previously had any cardiac or pulmonary issues. Upon physical examination you notice a holosystolic blowing murmur radiating to the right sternal border, which the patient denies being told about previously. Based on this presentation, what is the most likely cause of the murmur?
assistant
Tricuspid regurgitation