1.Nonstructural Dysfunction of Mechanical Valve.
Jong Mok SHIN ; Dong Seop JEONG ; Kyung Hwan KIM ; Hyuk AHN
The Korean Journal of Thoracic and Cardiovascular Surgery 2001;34(1):91-93
Nonstructural valvular dysfunction of the mechanical valve is one of the serious complications after valve replacement. It may be caused by various factors; 1) entrapment by pannus, tissue or suture material 2) paravalvular leakage 3) inappropriate sizing or positioning. We have experienced the rare case of nonstructural valvular dysfunction caused by abnormal subaortic pannus ingrowth associated with malposition of mechanical valve. We removed the pannus and successfully performed valve replacement after annulus enlargement procedure(Nicks procedure).
Heart Valve Prosthesis
;
Sutures
2.A 6 year experience with the St. Jude Medical cardiac valve prosthesis.
Kwang Hyun CHO ; Youn Ho WHANG ; Yang Haeng LEE ; Shin Hyun JUNG ; Kang Joo CHOI
The Korean Journal of Thoracic and Cardiovascular Surgery 1992;25(3):296-306
No abstract available.
Heart Valve Prosthesis*
;
Heart Valves*
3.Influence of pivot distance on the performance of a mechanic heart valve.
Yong ZHANG ; Liangliang WU ; Nan HUANG
Journal of Biomedical Engineering 2014;31(5):1037-1040
Based on the analysis of the influence of the valve pivot distance on the performance of mechanical heart valve (MHV), such as the valve opening and closing features, flow field characteristics and the valve assembly properties, value constraints of the valve pivot distance were established, and the reasonable valve was obtained by means of the finite element method. It can be shown that the central flow characteristics of the valve could be enhanced with the increasing of the ratio of pivot distance to valve inner diameter, but the plastic deformation of the ring could be liable to occur in the MHV assembly process. It is proved that the valve of specifications can be designed in similar ratio of pivot distance to valve inner diameter according to the result of the valve performance experiment.
Heart Valve Prosthesis
;
Heart Valves
;
Prosthesis Design
4.Preanesthetic Cardiopulmonary Bypass for Mechanical Mitral Valve Dysfunction.
Ferit CICEKCIOGLU ; Cetin Murat SONGUR ; Emir EROL ; Ahmet Kuddusi IRDEM
The Korean Journal of Thoracic and Cardiovascular Surgery 2013;46(5):380-382
No abstract available.
Cardiopulmonary Bypass
;
Heart Valve Prosthesis
;
Mitral Valve
;
Prosthesis Failure
5.A case of successful transcatheter aortic valve implantation for severe noncalcified aortic regurgitation.
Xianbao LIU ; Liang DONG ; Jubo JIANG ; Qijing ZHOU ; Wei HE ; Zhaoxia PU ; Liming ZHOU ; Zhaoxu HUANG ; Yan FENG ; Minjian KONG ; Yinghong HU ; Yong SUN ; Jun JIANG ; Youqi FAN ; Aiqiang DONG ; Min YAN ; Jianan WANG
Chinese Journal of Cardiology 2015;43(2):185-186
7.Research Method of Fatigue Performance of Surgically Implanted Heart Valve Stent.
Li LIU ; Wei LIU ; Wencai ZOU ; Chenxi WANG ; Hongxia XU ; Chunren WANG
Chinese Journal of Medical Instrumentation 2021;45(6):689-691
The aim of this study was to evaluate the fatigue property
Heart Valve Prosthesis
;
Heart Valves
;
Materials Testing
;
Prosthesis Design
;
Stents
10.Transcatheter Aortic Valve Implantation in a Patient with Previous Mitral Valve Replacement.
Sung Woo MOON ; Young Guk KO ; Geu Ru HONG ; Sak LEE ; Byung Chul CHANG ; Jae Kwang SHIM ; Young Ran KWAK ; Myeong Ki HONG
Korean Circulation Journal 2014;44(5):344-347
Transcatheter aortic valve implantation (TAVI) has shown favorable outcomes in patients with severe symptomatic aortic valve stenosis who are at high surgical risk or are unsuitable candidates for open heart surgery. However, concerns exist over treating patients who have previously undergone mitral valve surgery due to the potential interference between the mitral prosthetic valve or ring and the TAVI device. In this case report, we present a patient with symptomatic severe aortic stenosis and previous mechanical mitral valve replacement who was successfully treated with TAVI using a CoreValve.
Aortic Valve Stenosis
;
Aortic Valve*
;
Catheters
;
Heart Valve Prosthesis
;
Humans
;
Mitral Valve*
;
Prosthesis Implantation
;
Thoracic Surgery
Result Analysis
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