Pseudoaneurysm of mitral-aortic intervalvular fibrosa following regurgitation of congenital bicuspid aortic valve in a 63-year-old patient: a case report

Pseudoaneurysm of mitral aortic intervalvular fibrosa (P-MAIVF) is a rare but potentially catastrophic condition. P-MAIVF is often associated with infective endocarditis, aortic valve surgery or chest trauma. However, P-MAIVF attributed to congenital abnormality is even rarer. Here, we present a case of chronic, non-infective P-MAIVF associated with congenital bicuspid aortic valve. In the present case, there is neither a history nor sign suggesting infective endocarditis, nor positive blood or tissue culture results. The preoperative Transesophageal echocardiography (TEE) examination detected P-MAIVF with severe regurgitation of bicuspid aortic valve, which was misdiagnosed as pure bicuspid aortic valve regurgitation by transthoracic echocardiogram (TTE). Consequently, TEE provides valuable information on the diagnosis and choice of surgery for the patient.