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Artificial valve replacement for congenital bicuspid aortic valves
S Koide1, K Kanabuchi, S Odagiri
1Department of Surgery I, Tokai University School of Medicine, Kanagawa, Japan.
The Tokai Journal of Experimental and Clinical Medicine
|December 1, 1993
Summary
Bicuspid aortic valve disease requires aortic valve replacement (AVR), often presenting with stenosis or regurgitation. Outcomes differ significantly compared to tricuspid aortic valve disease, particularly regarding age, complications like infective endocarditis, and operative mortality.
Area of Science:
- Cardiovascular Surgery
- Valvular Heart Disease
- Congenital Heart Defects
Background:
- Congenital bicuspid aortic valve (BAV) is a common heart defect.
- BAV can lead to aortic stenosis or regurgitation, often requiring surgical intervention.
- Degeneration, calcification, and infective endocarditis are key complications.
Purpose of the Study:
- To compare outcomes of aortic valve replacement (AVR) in patients with bicuspid aortic valve (BAV) versus acquired tricuspid aortic valve (TAV) disease.
- To analyze differences in patient demographics, valve characteristics, and operative results between BAV and TAV groups.
- To evaluate specific complications and mortality rates associated with BAV stenosis and regurgitation.
Main Methods:
- Retrospective comparison of 22 patients with incompetent BAV (14 stenosis, 8 regurgitation) undergoing AVR.
- Comparison group comprised 96 patients with acquired TAV disease (30 stenosis, 66 regurgitation) undergoing AVR during the same period.
- Analysis of preoperative data, valve characteristics, surgical details, and operative outcomes.
Main Results:
- Patients with BAV stenosis were older at AVR, had smaller preoperative valve orifices and ring diameters, and experienced no operative deaths compared to TAV stenosis.
- Patients with BAV regurgitation were younger at AVR, had a significantly higher incidence of infective endocarditis, and a trend towards higher operative mortality compared to TAV regurgitation.
- Meticulous suture repair is crucial for patients with BAV and significant poststenotic dilatation of the ascending aorta.
Conclusions:
- BAV disease presents distinct clinical and surgical characteristics compared to TAV disease.
- BAV stenosis patients show favorable outcomes post-AVR, while BAV regurgitation carries higher risks, particularly infective endocarditis.
- Careful surgical technique is essential, especially in managing associated aortic dilation.