Tehran University of Medical Sciences The Research in Heart Yield and Translational Medicine (RHYTHM) 3115-7270 7 4 2015 10 13 188 190 EN Mohammad Sahebjam Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Abbas Salehiomran Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Neda Ghaffari-Marandi Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Azam Safir Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. 2015 10 10 2015 10 10 One of the most serious complications of mitral valve replacement is left ventricular rupture and pseudoaneurysm formation, which is rare but potentially lethal. We herein present a late type of post mitral valve replacement and coronary artery bypass surgery pseudoaneurysm in a 74-year-old female, who was admitted to our hospital with a recent history of exertional dyspnea. She had the above-mentioned operation 10 months before. The diagnosis was made via two-dimensional and real-time three-dimensional transthoracic echocardiography. The prosthetic mitral valve was removed, and the large orifice of the pseudoaneurysm was closed by surgery. At one year's follow-up, the patient was in good condition. https://rhythm.tums.ac.ir/index.php/jthc/article/view/272 https://rhythm.tums.ac.ir/index.php/jthc/article/download/272/265