Abstract：
Mitral regurgitation (MR) is a common form of valvular heart disease that is associated with significant morbidity and mortality. MR can be broadly classified into 2 different categories: primary and secondary MR. Primary MR usually is caused by leaflet abnormalities, whereas secondary MR is a chronic disease secondary to geometric distortion of both the annulus and subvalvular apparatus because of left ventricular remodeling. Without acute changes in loading conditions, myocardial blood flow, or rhythm disturbances, functional MR typically is not transient. In this E-Challenge, the authors show a transient and completely reversible acute and severe form of functional MR with the use of multimodal echocardiography.
摘要：
二尖瓣返流(MR)是瓣膜性心脏病的常见形式,其与显著的发病率和死亡率相关。MR可大致分为2类:原发性MR和继发性MR。原发性MR通常是由小叶异常引起的，而继发性MR是一种慢性疾病，继发于左心室重塑引起的瓣环和瓣下装置的几何变形。在载荷条件没有剧烈变化的情况下，心肌血流量,或节奏紊乱，功能MR通常不是瞬态的。在这个电子挑战中，作者使用多模态超声心动图显示了一种短暂且完全可逆的急性和严重形式的功能性MR.
