Ambrosi P, Faugère G, Desfossez L, Habib G, Bory M, Luccioni R, Bernard P
Department of Magnetic Resonance, Hôpital de la Timone, Marseille, France.
Eur Heart J. 1995 Mar;16(3):406-9. doi: 10.1093/oxfordjournals.eurheartj.a060925.
A new method of assessing the severity of aortic regurgitation severity by magnetic resonance imaging has been developed. Two groups were studied: 20 controls (age = 58 +/- 19 years) without valvular aortic disease, and 24 patients (age = 62 +/- 13 years) with chronic aortic insufficiency evaluated by magnetic resonance and aortic root cineangiography within 1 week of each other. A magnetic resonance sequence (TR = 35 ms/TE = 12 ms/flip angle = 20 degrees/magnet = 1.5 T) was acquired in a plane containing the thoracic aorta. A transverse saturation band 30 mm wide was positioned 30-40 mm above the aortic valve. Aortic insufficiency was graded; the importance of end-diastolic retrograde movement in the saturation band in the descending aorta was noted. Magnetic resonance was also compared to Doppler echocardiography in 20 patients. In the controls, we found that retrograde blood flow was absent (18/20) or mild (2/20). In contrast, the presence of marked retrograde movement in a saturation band across the thoracic aorta was always associated with severe aortic regurgitation (angiographic grade III or IV). This rapid method (imaging time less than 20 min) can be applied in most patients with aortic regurgitation and is likely to be helpful when echocardiography is not possible or gives inconclusive results.
一种通过磁共振成像评估主动脉反流严重程度的新方法已被开发出来。研究了两组对象：20名无主动脉瓣疾病的对照者（年龄 = 58 ± 19岁），以及24名患有慢性主动脉瓣关闭不全的患者（年龄 = 62 ± 13岁），他们在彼此相隔1周内接受了磁共振成像和主动脉根部电影血管造影检查。在包含胸主动脉的平面上采集了一种磁共振序列（TR = 35毫秒/TE = 12毫秒/翻转角 = 20度/磁体 = 1.5特斯拉）。在主动脉瓣上方30 - 40毫米处放置一个30毫米宽的横向饱和带。对主动脉瓣关闭不全进行分级；记录降主动脉饱和带中舒张末期逆向血流的情况。还对20名患者的磁共振成像结果与多普勒超声心动图结果进行了比较。在对照者中，我们发现逆向血流不存在（18/20）或轻度（2/20）。相比之下，胸主动脉饱和带中出现明显逆向血流总是与严重主动脉反流（血管造影分级为III级或IV级）相关。这种快速方法（成像时间少于20分钟）可应用于大多数主动脉反流患者，并且在无法进行超声心动图检查或结果不明确时可能会有所帮助。
