Inoue T, Watanabe S, Sakurada H, Ono K, Urano M, Hijikata Y, Saito I, Masuda Y
The Third Department of Internal Medicine, Chiba University School of Medicine, Japan.
Jpn Circ J. 2000 Oct;64(10):760-4. doi: 10.1253/jcj.64.760.
In 21 patients with chronic aortic dissections and proven patent false lumens, the flow volume and flow patterns in the patent false lumens was evaluated using velocity-encoded cine magnetic resonance imaging (VENC-MRI) and the relationship between the flow characteristics and aortic enlargement was retrospectively examined. Flow patterns in the false lumen were divided into 3 groups: pattern A with primarily antegrade flow (n=6), pattern R with primarily retrograde flow (n=3), and pattern B with bidirectional flow (n=12). In group A, the rate of flow volume in the false lumen compared to the total flow volume in true and false lumens (%TFV) and the average rate of enlargement of the maximum diameter of the dissected aorta per year (deltaD) were significantly greater than in groups R and B (%TFV: 74.1+/-0.07 vs 15.2+/-0.03 vs 11.8+/-0.04, p<0.01; deltaD: 3.62+/-0.82 vs 0 vs 0.58+/-0.15 mm/year, p<0.05, respectively). There was a significant correlation between %TFV and deltaD (r=0.79, p<0.0001). Evaluation of flow volume and flow patterns in the patent false lumen using VENC-MRI may be useful for predicting enlargement of the dissected aorta.
在21例慢性主动脉夹层且已证实假腔通畅的患者中，使用速度编码电影磁共振成像（VENC-MRI）评估通畅假腔内的血流量和血流模式，并回顾性研究血流特征与主动脉扩张之间的关系。假腔内的血流模式分为3组：主要为顺向血流的A组（n = 6）、主要为逆向血流的R组（n = 3）和双向血流的B组（n = 12）。在A组中，假腔内血流量与真腔和假腔总血流量的比值（%TFV）以及夹层主动脉最大直径每年的平均扩大率（deltaD）显著高于R组和B组（%TFV：74.1±0.07 vs 15.2±0.03 vs 11.8±0.04，p<0.01；deltaD：3.62±0.82 vs 0 vs 0.58±0.15 mm/年，p<0.05）。%TFV与deltaD之间存在显著相关性（r = 0.79，p<0.0001）。使用VENC-MRI评估通畅假腔内的血流量和血流模式可能有助于预测夹层主动脉的扩张。
