The objective of the study is to obtain the clinical data from patients who had the Perimount Heat Valve (Type:6900P and 2900) Replacement Surgery in Guangdong General Hospital during 2001-2007 in order to evaluate the performace of this heart valve prothesis and collect the patients' post-operation infomation including the current living status, mortality rate, and the possibility of re-operationļ¼bleeding and thrombosis. This is a retrospective , observentional clinical study to be conducted in Guangdong General Hospital in China. This study will enroll up to 200 patients.
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The Performance Evaluation of Perimount Heart Valve(Type:6900P and 2900) by Echocardiography
Timeframe: 7-15 years after heart valve replacement surgery (during 2001-2007)