Department of Cardiology, Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands.
Catheter Cardiovasc Interv. 2010 Oct 1;76(4):602-7. doi: 10.1002/ccd.22641.
We investigate the accuracy of a new software system (C-THV, Paieon) designed to calculate the optimal projection (OP) view for transcatheter aortic valve implantation (TAVI) based on two aortograms, and its agreement with the operator's choice. An optimal fluoroscopic working view projection with all three aortic cusps depicted in one line, is crucial during TAVI. In our institution selection of the OP is based on multislice computed tomography (MSCT). Seventy-three consecutive patients referred for TAVI were divided into two groups. For the first group (53 patients, retrospective cohort) we compared the OP views estimated by C-THV with the ones estimated by MSCT. For the second group (20 patients, prospective cohort), we compared the OP views estimated by C-THV with the operator's choice during TAVI. For the retrospective cohort, the mean absolute difference (mean ± SD) between C-THV and MSCT was 6.6 ± 4.9 degrees. In 77% of the cases the mean difference between C-THV and MSCT was <10 degrees. For the prospective cohort, the mean absolute difference (mean ± SD) between C-THV and the operator's choice was 5.5 ± 3.4 degrees. A mean difference of <10 degrees was found in 90% of the cases. In this study we found that the C-THV software estimated the OP view for TAVI with good accuracy. The level of agreement between C-THV and either the MSCT or the operator's choice was deemed satisfactory, with the vast majority of observed differences being <10 degrees.
我们研究了一种新软件系统（C-THV，派安）的准确性，该系统旨在根据两个主动脉造影图计算经导管主动脉瓣植入术（TAVI）的最佳投影（OP）视图，并与术者选择的视图进行比较。在 TAVI 过程中，获得一个能同时显示三个主动脉瓣叶的最佳透视工作视图投影至关重要。在我们的机构中，OP 的选择基于多层计算机断层扫描（MSCT）。73 例连续接受 TAVI 治疗的患者分为两组。对于第一组（53 例，回顾性队列），我们比较了 C-THV 估计的 OP 视图与 MSCT 估计的 OP 视图。对于第二组（20 例，前瞻性队列），我们比较了 C-THV 估计的 OP 视图与 TAVI 过程中术者的选择。对于回顾性队列，C-THV 与 MSCT 之间的平均绝对差异（平均值±标准差）为 6.6±4.9 度。在 77%的情况下，C-THV 与 MSCT 之间的平均差异<10 度。对于前瞻性队列，C-THV 与术者选择之间的平均绝对差异（平均值±标准差）为 5.5±3.4 度。在 90%的情况下，发现平均差异<10 度。在这项研究中，我们发现 C-THV 软件能够准确地估计 TAVI 的 OP 视图。C-THV 与 MSCT 或术者选择之间的一致性水平令人满意，绝大多数观察到的差异<10 度。
