RESUMEN
We report a case of quadricuspid aortic valve concomitant with infective endocarditis. A 73-year-old woman was admitted to our hospital because of general fatigue, loss of body weight and high fever. Transthoracic echocardiography showed moderate aortic regurgitation and left ventricle-right atrium fistulae with vegetation. Infectious endocarditis was diagnosed. Since her fever and hemolytic anemia were not controlled by antibiotics, we operated and the aortic valve had four cusps and there were vegetations on the aortic valve and left ventricle outflow tract. Perforation of the membranous septum was observed. Complete debridement and aortic valve replacement with patch repair of a left ventricle-right atrium (LV-RA) fistula was performed. Although she needed a permanent pacemaker due to complete AV block, her postoperative course was uneventful.