Leaflet Thickening and Stent Geometry in Sutureless Bioprosthetic Aortic Valves
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 47
- 试验地点
- 1
- 主要终点
- Regional expansion of valve prosthesis
研究概览
简要总结
A single-center prospective interventional trial. Patients implanted with a sutureless bioprosthetic aortic valve at Karolinska University Hospital in Stockholm, Sweden from 2012 will be eligible. 4-dimensional volume-rendered computed tomography (CT) of the heart will be performed. The aim of the CT is to assess valve geometry and hypo-atrenuated leaflet thickening. Results of the CT examination, preoperative clinical characteristics, and postoperative clinical data will be registered. Data will be collected prospectively and retrospectively. Informed consent will be obtained from patients meeting the inclusion criteria before the initiation of any study-specific procedures.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Implanted with a sutureless Perceval (LivaNova) sutureless bioprosthetic aortic valve at Karolinska University Hospital in Stockholm, Sweden between 2012 and 2016
- •Provide written informed consent
排除标准
- •Contraindication for CT with intravenous contrast injection
研究组 & 干预措施
Cardiac CT imaging
干预措施: 4-dimensional volume-rendered computed tomography (Radiation)
结局指标
主要结局
Regional expansion of valve prosthesis
时间窗: At CT performed once no less than 30 days and up to 10 years after aortic valve replacement
Regional expansion measured using the angle formed by the border of each prosthetic leaflet and the centre point of the valve
Overall expansion of valve prosthesis
时间窗: At CT performed once no less than 30 days and up to 10 years after aortic valve replacement
Overall expansion of the implanted prosthesis calculated as the ratio between the ex vivo cross-sectional area and the in vitro cross-sectional area of the implanted valve
次要结局
- Eccentricity of valve prosthesis(At CT performed once no less than 30 days and up to 10 years after aortic valve replacement)
研究者
Magnus Dalén
MD PhD
Karolinska University Hospital