2019年12月1日 · Step by step processing of pre-procedural CT images to determine maximum diameter, minimum diameter, and circumference of the left atrial appendage (LAA) ostium as well as the length of the LAA on post-processing software.

2020年2月7日 · The LAA has a highly variable size and shape, and cardiac imaging is critical to determine appropriate patient selection and device sizing. While transesophageal echocardiography is the current standard for preprocedural planning prior to LAAO, CT is a promising alternative that may improve device size selection due to its acquisition of a ...

2021年5月3日 · Transcatheter left atrial appendage (LAA) closure is an alternative to long-term anticoagulation therapy in selected patients with nonvalvular atrial fibrillation who have an increased risk for stroke. LAA closure devices can be implanted by means of either an endocardial or a combined endocardial and epicardial approach.

Cardiac CT is increasingly used to plan transcatheter LAAO. High-quality multiplanar and 3D imaging allow accurate device sizing and efficient LAAO. A standardized protocol for cardiac CT is paramount for a high-quality result. Pre-procedural cardiac CT may improve the accuracy, efficacy, and safety of LAAO.

2015年3月15日 · CT sizing of the LAA prior to interventional closure is feasible. Initial data potentially favor perimeter derived effective diameter for sizing. Whether CT-based sizing would correlate to better interventional or clinical outcomes needs to be further evaluated.

Transcatheter left atrial appendage (LAA) closure is an alternative to long-term anticoagulation therapy in selected patients with nonvalvular atrial fibrillation who have an increased risk for stroke. LAA closure devices can be implanted by means of either an endocardial or a combined endocardial a …

术前CT LAA造影测得LAA参数包括LAA锚定区和LAA解剖口的最大径、最小径、平均直径,以及LAA深度。 分析LAA各参数与置入Watchman封堵器型号的相关性。 结果35例患者中封堵成功33例 (残余分流≤5 mm),失败2例。 对最终成功置入封堵器的33例患者的术前影像进行三维数据测量。

2025年3月27日 · Due to its better spatial resolution, CT allows not only for a precise assessment of the LAA orifice and landing zone dimensions but also for the LAA relationship with important surrounding structures [15,16]. Improvement in sizing accuracy is essential to optimize procedure efficiency by reducing procedural time, radiation exposure, the number ...

舒张后FEV1%pred的回归方程为：FEV1%pred65.582+4.014×肺容积-7.508×ln （LAA%+0.1） -10.264×性别。在判断舒张后FEV1下降程度时，回归方程优于单独使用LAA%和肺容积；在判断舒张后FEV1%pred下降程度时，回归方程和LAA%优于肺容积。

Left atrial appendage (LAA) device imaging after endovascular closure is important to assess for device thrombus, residual leak, positioning, surrounding structures, and pericardial effusion. Cardiac CT angiography (CCTA) is well suited to assess these non-invasively.