Perivalvular Abscess of Tricuspid Valve: A Rare Complication of Infective Endocarditis

Infective endocarditis is a serious complication of intravenous (IV) drug abuse, with a reported mortality of 5 to 10%. A 21-year-old man, who was an intravenous drug abuser, presented with fever and dyspnea. Transthoracic echocardiography showed a highly mobile, large vegetation on the anterior leaflet of the tricuspid valve. Despite antibiotic therapy for ten days, the patient remained febrile. Transesophageal echocardiography revealed severe aortic regurgitation and an echo-lucent space between the tricuspid and aortic valves. Color Doppler demonstrated a flow within the echo-lucent space and a connection between that and the left ventricle, suggesting a perivalvular abscess of the tricuspid valve opening in the left ventricle. The patient was transferred to the operating room, where he unfortunately expired.