Nishimura F
Department of Cardiology, Kameda General Hospital, Kamogawa, Japan.
Clin Cardiol. 1992 Feb;15(2):73-8. doi: 10.1002/clc.4960150204.
The results of oblique cine magnetic resonance imaging (MRI) through a long axis slice of the left ventricle in 40 patients was compared with cineangiography in order to determine the usefulness of cine MR imaging for the evaluation of aortic regurgitation (AR). A diastolic dark low-intensity flow signal extending from the aortic valve into the left ventricle was seen in all 30 patients with AR, and in none of the 10 patients without AR. The length and area of the low-intensity signal due to the regurgitant flow were planimetered, and the ratio to the length and area of the left ventricle was calculated. The best correlation with angiography was with the ratio of the area of the low-intensity signal (ALIS) to the area of the left ventricle (ALV); it correctly classified the degree of regurgitation in 28 of the 30 patients (93.3%). The ALIS/ALV ratio was under 25% in all 11 patients with angiographic mild AR, 26-50% in 10 of the 11 patients with moderate AR, and over 51% in 7 of the 8 patients with severe AR. Thus the results point to a high degree of correlation between long axis oblique cine MRI and cineangiography in the identification of AR and in providing a semiquantitative estimation of its severity.
为了确定电影磁共振成像（cine MR imaging）在评估主动脉瓣反流（AR）中的作用，对40例患者通过左心室长轴切片进行斜位电影磁共振成像（MRI）的结果与电影血管造影进行了比较。在所有30例AR患者中均可见到从主动脉瓣延伸至左心室的舒张期低强度暗血流信号，而在10例无AR的患者中均未见到。对反流性血流导致的低强度信号的长度和面积进行了面积测量，并计算其与左心室长度和面积的比值。与血管造影相关性最好的是低强度信号面积（ALIS）与左心室面积（ALV）的比值；它在30例患者中的28例（93.3%）中正确地对反流程度进行了分类。在血管造影显示为轻度AR的所有11例患者中，ALIS/ALV比值均低于25%，在11例中度AR患者中的10例中为26 - 50%，在8例重度AR患者中的7例中超过51%。因此，结果表明长轴斜位电影MRI与电影血管造影在识别AR以及对其严重程度进行半定量评估方面具有高度相关性。
