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Clinical application of cardiac magnetic resonance feature tracking technique in rheumatic mitral stenosis and concurrent atrial fibrillation
HOU Jie  SUN Yu  ZHANG Libo  YOU Hongrui  ZHANG Rongrong  SHI Jinglong  YANG Benqiang 

Cite this article as: Hou J, Sun Y, Zhang LB, et al. Clinical application of cardiac magnetic resonance feature tracking technique in rheumatic mitral stenosis and concurrent atrial fibrillation[J]. Chin J Magn Reson Imaging, 2022, 13(4): 107-110. DOI:10.12015/issn.1674-8034.2022.04.020.


[Abstract] Objective To evaluate the clinical application of cardiovascular magnetic resonance imaging feature tracking (CMR-FT) in patients with rheumatic mitral stenosis and concurrent atrial fibrillation (RMS-AF).Materials and Methods We retrospectively studied 26 patients with RMS-AF who were treated in our hospital from January 2020 to July 2021. Their clinical and cardiac MRI data before surgery were analyzed, while 10 normal CMR subjects in the same period were collected as the healthy control group. CMR-FT was used to analyze the left atrium (LA) strain (εs/εe/εa) and strain rate (SRs/SRe/SRa). εs/SRs, εe/SRe and εa/SRa represented LA storage function, pipeline function and booster pump function respectively.Results Compared with control group, RMS-AF group had higher heart rate [(77±7) vs. (96±26), t=3.492, P=0.001]; In RMS-AF group, left ventricular function decreased [(59.9±6.7)% vs. (42.0±9.1)%, t=-5.599, P<0.001], LA diameter increased [(30.8±3.0) vs. (55.9±13.0), t=5.989, P<0.001], left atrial total ejection fraction decreased [(58.3±2.1)% vs. (12.1±3.5)%, t=-39.401, P<0.001], and LA global functional strain parameters εs/εe/εa/SRs/SRe/SRa were significantly decreased than those in the control group (all P<0.001). The inter and intraclass correlation coefficients (ICC) of RMS-AF group and the control group showed good consistency (ICC≥0.88, 95% CI: 0.78-0.93).Conclusions CMR-FT can evaluate the LA strain parameters and judge LA function (reservoir, pipeline, and booster pump function) without contrast agent. It can be used as a helpful imaging biomarker of clinical diagnosis and treatment in RMS-AF.
[Keywords] atrial fibrillation;cardiovascular magnetic resonance;feature tracking;left atrial function;strain

HOU Jie1, 2   SUN Yu1, 2   ZHANG Libo1, 2   YOU Hongrui1, 2   ZHANG Rongrong1, 2   SHI Jinglong1, 2   YANG Benqiang1, 2*  

1 Department of Radiology, General Hospital of the Northern Theater Command, Shenyang 110016, China

2 Key Laboratory of Cardiovascular Imaging and Research, Shenyang 110016, China

Yang BQ, E-mail: bqyang888@sina.com

Conflicts of interest   None.

Received  2021-12-15
Accepted  2022-03-23
DOI: 10.12015/issn.1674-8034.2022.04.020
Cite this article as: Hou J, Sun Y, Zhang LB, et al. Clinical application of cardiac magnetic resonance feature tracking technique in rheumatic mitral stenosis and concurrent atrial fibrillation[J]. Chin J Magn Reson Imaging, 2022, 13(4): 107-110.DOI:10.12015/issn.1674-8034.2022.04.020

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