本网站上的Cookie
我们使用cookies,以确保我们为您提供我们网站上的最佳体验。如果你点击“继续”,我们假定你很高兴接受所有Cookie,你不会再看到这条消息。点击“了解更多”,了解有关如何更改cookie设置的信息。

背景:利用超短回波时间相衬速度映射序列(UTE)径向k-空间序列已被用于减少素内以高速移相。我们评价了二尖瓣反流(MR)定量,包括患有心房纤维性颤动的UTE流序列的准确度。METHODS:Forty patients underwent cardiac MRI for indirect MR quantification by assessment of aortic flow using a UTE phase contrast sequence (TE 0.65 ms) combined with left ventricular stroke volume. Retrospective ECG-gating was used in sinus rhythm (30 patients), prospective ECG-triggering in atrial fibrillation (10). MR was also quantified by a standard phase contrast sequence (TE 2.85 ms, standard flow method) and by comparing stroke volumes (volumetric method). RESULTS:UTE flow-derived MR measurement showed modest agreement in sinus rhythm (95% limits of agreement: ±38.2 ml; ±29.8%) and atrial fibrillation (±33.7 ml; ±30.3%) compared to standard flow assessment. There was little systematic bias in sinus rhythm (mean offset -4.4 ml /-3.5% compared to standard flow assessment), but a slight bias towards greater regurgitation in atrial fibrillation (+15.2 ml /+14.0%). There were wider limits of agreement between the UTE flow method and volumetric method than between the regular flow method and the volumetric method in sinus rhythm (±48.4 ml; ±36.4%; mean offset: -12.2 ml /-9.0%) and similar limits of agreement in atrial fibrillation (±29.6 ml; 25.8%; +12.0 ml /+10.3%). CONCLUSIONS:UTE flow imaging is inferior to conventional flow techniques for MR assessment in patients with sinus rhythm as well as atrial fibrillation. However, the number of atrial fibrillation patients in this initial study is small.

原始出版物

DOI

10.1016 / j.ijcard.2020.05.031

类型

myball游戏下载

日志

心脏病学的国际期刊

发布日期

18/05/2020

地址

心内科医学系,埃尔兰根 - 纽伦堡大学,Ulmenweg 18,91054德国埃尔兰根部。电子地址:michaela.hell@uk-erlangen.de。