Pseudoaneurysm of the mitral-aortic intervalvular fibrosa (P-MAIVF) is a rare complication of infective endocarditis and aortic valve replacement. Ruptured P-MAIVF and angina due to compression of the coronary arteries are severe complications of this condition. We report a case of P-MAIVF that was diagnosed accidentally during a routine checkup. The patient was asymptomatic; however, she had a systolic murmur. She had a history of infective endocarditis, which was treated conservatively without open-heart surgery. In addition, she was diagnosed with aortic valve stenosis, aortic valve regurgitation, bicuspid aortic valve, right coronary artery stenosis, and an ascending aortic aneurysm. She was treated with surgery, which involved patch closure of P-MAIVF with aortic valve replacement, coronary artery bypass grafting, and ascending aorta replacement. After the operation, echocardiography showed no leakage from the P-MAIVF. It is necessary to have knowledge of P-MAIVF. Following up cases of infective endocarditis and post-aortic valve replacement using echocardiography is important for both, diagnosing P-MAIVF and preventing serious complications such rupture and angina.

中文翻译：

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意外发现的二尖瓣主动脉瓣假性二尖瓣-主动脉间隔纤维瘤、升主动脉瘤、心肌缺血的外科治疗一例

二尖瓣-主动脉间隔纤维化（P-MAIVF）假性动脉瘤是感染性心内膜炎和主动脉瓣置换术的罕见并发症。由于冠状动脉受压导致的 P-MAIVF 破裂和心绞痛是这种情况的严重并发症。我们报告了一例在例行检查中意外诊断出的 P-MAIVF 病例。患者无症状；然而，她有收缩期杂音。她有感染性心内膜炎病史，未经心脏直视手术保守治疗。此外，她被诊断出患有主动脉瓣狭窄、主动脉瓣关闭不全、二叶主动脉瓣、右冠状动脉狭窄和升主动脉瘤。她接受了手术治疗，包括 P-MAIVF 贴片闭合与主动脉瓣置换术、冠状动脉旁路移植术、和升主动脉置换术。手术后，超声心动图显示 P-MAIVF 无渗漏。有必要了解 P-MAIVF。使用超声心动图跟踪感染性心内膜炎和主动脉瓣置换术后病例对于诊断 P-MAIVF 和预防严重并发症（如破裂和心绞痛）都很重要。