Objective: To show the experience in dealing with mitral valve injury caused by trauma.
Methods: Four cases of closed injury of mitral valve were treated.
Results: Two of the four patients presented ruptured chordae of mitral valve and were cured with annutoplasty plus repair of the chordae and mitral valve replacement respectively. One presented tearing of mitral valve leaf and pseudoaneurysm of the femoral artery, which were complicated by infective endocarditis. The patient was cured with emergency operation to repair the lesions and remove pseudoaneurysm and neoplasm in the mitral valve. Another patient, who received mitral valve replacement 8 years before, presented ruptured valve-hook of the prosthesis and died of acute heart failure without prompt operation. The diagnosis was confirmed by autopsy.
Conclusions: The disease is easy to misdiagnose and once the diagnosis is established surgical intervention should be performed early. Emergency operation is necessary if acute heart failure occurs or infective endocarditis is complicated.