Replacement of the Native Mitral Valve Due to Endocarditis Caused by Stenotrophomonas Maltophilia

Abstract We report a case of a 59-year-old female patient with vegetative native mitral valve endocarditis caused by Stenotrophomonas maltophilia (SM). She had hemodialysis-dependent chronic renal failure, but no immunosuppressive disease. Echocardiography showed mobile vegetation on her native mitral valve. Right femoral artery embolectomy and mitral valve replacement were performed simultaneously. She awakened from anesthesia, but she passed away due to septic shock complications. To the best of our knowledge, this was the first case in whom native mitral valve endocarditis caused by SM was observed (despite of absence of any immunosuppressive event) and needed to undergo valve replacement.

摘要：我们报告1例59岁女性患者，罹患嗜麦芽窄食单胞菌（Stenotrophomonas maltophilia，SM）所致的自体二尖瓣感染性心内膜炎伴赘生物形成。该患者依赖血液透析治疗慢性肾衰竭，但无免疫抑制相关疾病病史。超声心动图显示其自体二尖瓣存在活动性赘生物。遂同期行右侧股动脉取栓术与二尖瓣置换术。患者术后麻醉苏醒后，因感染性休克并发症去世。据我们所知，本例为全球首例无免疫抑制相关病史、由嗜麦芽窄食单胞菌引发的自体二尖瓣感染性心内膜炎病例，且需接受瓣膜置换手术。