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논문 기본 정보

자료유형
학술저널
저자정보
Kawakubo Masateru (Department of Health Sciences Faculty of Medical Sciences Kyushu University Fukuoka Japan.) Nagao Michinobu (Department of Diagnostic Imaging) Nakao Risako (Department of Cardiology The Heart Institute of Japan Tokyo Women’s Medical University Tokyo Japan.) Watanabe Eri (Department of Cardiology The Heart Institute of Japan Tokyo Women’s Medical University Tokyo Japan.) Yoneyama Masami (Philips Electronics Japan Ltd. Tokyo Japan.) Hagiwara Nobuhisa (Department of Cardiology The Heart Institute of Japan Tokyo Women’s Medical University Tokyo Japan.) Sakai Shuji (Department of Diagnostic Imaging)
저널정보
아시아심장혈관영상의학회 Cardiovascular Imaging Asia Cardiovascular Imaging Asia Vol.6 No.1
발행연도
2022.1
수록면
4 - 12 (9page)
DOI
10.22468/cvia.2021.00339

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Objective: In steady-state free precession (SSFP) cine imaging, signal loss can be observed as accelerated dark flow in patients with valvular disease and decelerated dark flow (DDF) in patients with severe left ventricular (LV) dysfunction. In our study, we measured DDF with optical flow calculations and investigated the relationship between DDF and myocardial strain or intraventricular dyssynchrony. Materials and Methods: Fifty-seven consecutive patients with heart failure were retrospectively enrolled. In the short-axis orientation, the optical flow magnitude vector of the DDF was calculated over a cardiac cycle. The maximum value of the mean magnitude vector in the LV blood region was defined as the DDF index. The systolic circumferential strain (CS) of the LV free-wall, as well as the absolute difference in systolic timing of the LV free-wall and interventricular septum (LV dyssynchrony, LVD), was measured using the feature-tracking method. Spearman’s correlation coefficients (ρ) were calculated between DDF and CS or LVD. Results: Median and interquartile ranges (25th to 75th percentile) of measured DDF, CS, and LVD in 57 patients were 14.0 (10.3 to 20.4), -8.0% (-13.3 to -3.2), and 40 ms (21 to 99), respectively. There were statistically significant correlations between the values of DDF and CS as well as LVD (0.60 and 0.48; p<0.01 for both). Conclusion: Measurement of DDF may provide a specific clinical picture of myocardial strain and intraventricular dyssynchrony. Furthermore, it is possible to cost-effectively measure DDF without additional image acquisition during routine MR examination.

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