心血管MR新技术在心脏瓣膜病中的应用进展

心脏瓣膜病（VHD）是老年人发生心血管事件的主要原因之一。影像学评估对诊断VHD及治疗决策至关重要。心血管MR （CMR）新技术在瓣膜病中的应用日益广泛，其中4D Flow MRI技术主要用于判断跨瓣血流速度、压差、壁剪切力、血流模式等血流动力学参数，T1 mapping/细胞外间质容积分数技术可定量评估继发于VHD的早期心室重构改变，心肌应变技术可监测早期心肌功能障碍。本文对CMR新技术在VHD中的应用进展进行综述。

Application progresses of new cardiovascular MR techniques on valvular heart disease

Valvular heart disease (VHD) is one kind of the main causes of cardiovascular events in the elderly patients. Cardiac imaging evaluation plays a critical role in the diagnosis and selection of treatment options for VHD. New cardiovascular MR (CMR) techniques have been increasingly used for VHD patients, of which 4D Flow MRI-derived hemodynamic parameters can be used to estimate transvalvular blood flow velocities, pressure gradients, wall shear stress and flow patterns, T1 mapping and extracellular volume fraction enable quantification of changes of early ventricular remodeling secondary to VHD, strain analysis can be used to assess early myocardial dysfunction. The application progresses of new CMR techniques on VHD were reviewed in this article.