Evaluation of Flow Volume and Flow Patterns in the Patent False Lumen of Chronic Aortic Dissections Using Velocity-Encoded Cine Magnetic Resonance Imaging

Toshihisa Inoue; Shigeru Watanabe; Hideki Sakurada; Katsuhiro Ono; Miharu Urano; Yasuyoshi Hijikata; Isao Saito; Yoshiaki Masuda

doi:10.1253/jcj.64.760

Clinical Studies

Evaluation of Flow Volume and Flow Patterns in the Patent False Lumen of Chronic Aortic Dissections Using Velocity-Encoded Cine Magnetic Resonance Imaging

Toshihisa Inoue, Shigeru Watanabe, Hideki Sakurada, Katsuhiro Ono, Miharu Urano, Yasuyoshi Hijikata, Isao Saito, Yoshiaki Masuda

Author information

Toshihisa Inoue
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
Shigeru Watanabe
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
Hideki Sakurada
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
Katsuhiro Ono
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
Miharu Urano
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
Yasuyoshi Hijikata
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
Isao Saito
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
Yoshiaki Masuda
The Third Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan

Keywords: Aortic dissection, Blood flow, Magnetic resonance imaging, Velocity-encoded cine magnetic resonance imaging (VENC-MRI)

JOURNAL FREE ACCESS

2000 Volume 64 Issue 10 Pages 760-764

DOI https://doi.org/10.1253/jcj.64.760

Details

Abstract

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 (ΔD) 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; ΔD: 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 ΔD (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.

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