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Ten Years Experiences of ATS Mechanical Valve  

Yi, Gi-Jong (Department of Thoracic and Cardiovascular Surgery, Yondong Severance Hospital, Yonsei University College of Medicine)
Bae, Mi-Kyung (Department of Thoracic and Cardiovascular Surgery, Yondong Severance Hospital, Yonsei University College of Medicine)
Lim, Sang-Hyun (Department of Thoracic and Cardiovascular Surgery, Yondong Severance Hospital, Yonsei University College of Medicine)
Yoo, Kyung-Jong (Department of Thoracic and Cardiovascular Surgery, Yondong Severance Hospital, Yonsei University College of Medicine)
Chang, Byung-Chul (Department of Thoracic and Cardiovascular Surgery, Yondong Severance Hospital, Yonsei University College of Medicine)
Hong, You-Sun (Department of Thoracic and Cardiovascular Surgery, Yondong Severance Hospital, Yonsei University College of Medicine)
Publication Information
Journal of Chest Surgery / v.39, no.12, 2006 , pp. 891-899 More about this Journal
Abstract
Background: This study is to evaluate the safety of ATS valve by examining the clinical results of ten-years experience. Material and Method: From July 1995 to March 2005, we reviewed 305 patients with ATS valve implantation. Mean age was $49.8{\pm}11.7$ years and 140(45.6%) males were included. Etiologies were rheumatic diseases in 207 cases(67.4%), degenerative changes in 57 cases(18.6%), valve dysfunction in 23 cases(7.5%) and infective endocarditis in 14 cases(4.6%). AVR was performed in 72 patients(23.5%), MVR in 156 patients (50.8%), DVR(AVR+MVR) in 63 patients(20.5%) and TVR in 16 patients(5.2%). Result: There were 9 operative mortalities(2.9%). Follow up period was $56.5{\pm}34.0(0{\sim}115)$ months and 96.4% patients were followed up with 9 late deaths. Five and ten years survival rates were $94.9{\pm}1.3%,\;91.2{\pm}2.3%$ using Kaplan-Meier's methods. Valve related event free survival rates in 5 and 10 years were $90.8{\pm}2.0%$ and $86.9{\pm}3.2%$. There were 16 anticoagulation-related hemorrhages, 6 thromboembolisms, 3 prosthetic valve endocarditis and 1 paravalvular leakage. NYHA class improved after operation(p<0.05). Postoperative echocardiography showed significant decrease in LA size, LVEDD and IVESD(p<0.01). Patients with 19 and 21 mm valve showed significantly higher transvalvular pressure gradient in aortic position(p<0.001, p<0.001). Conclusion: ATS valve showed good hemodynamic results with few valve related complications and thus can be used with acceptable risk.
Keywords
Heart valve, mechanical; Hemorrhage; Thromboembolism;
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