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• Clinical Article •
Comparative study of myocardial mechanical function changes before and after coronary artery bypass grafting using cardiac magnetic resonance feature tracking technique
BAN Chao  MA Xueying  WANG Jian  WANG Xin  QIAN Xinyu  CHAI Shengjie  NIU Ruilong  GE Lihong 

Cite this article as: BAN C, MA X Y, WANG J, et al. Comparative study of myocardial mechanical function changes before and after coronary artery bypass grafting using cardiac magnetic resonance feature tracking technique[J]. Chin J Magn Reson Imaging, 2025, 16(2): 29-34, 43. DOI:10.12015/issn.1674-8034.2025.02.005.


[Abstract] Objective To explore the application value of cardiac magnetic resonance imaging feature tracking (CMR-FT) technology inassessing the changes in myocardial mechanical function before and after coronary artery bypass grafting (CABG) in patients.Materials and Methods A total of 35 patients with coronary heart disease (CHD) who underwent coronary artery bypass grafting were selected, and 35 healthy volunteers were recruited as a control group. Both groups underwent CMR-FT examination, with myocardial mechanical function measured using united imaging healthcare's artificial intelligence technology and manually calibrated. CMR-FT was used to analyze the myocardial mechanical function of the left ventricle and obtain relevant parameters. To analyze the normality of variables using the Shapiro-Wilk test, variables that do not follow a normal distribution (circumferential displacement, circumferential velocity, circumferential strain rate, short-axis radial displacement, short-axis radial strain rate, longitudinal velocity, longitudinal strain rate, and longitudinal radial strain rate) should undergo the Wilcoxon rank-sum test for inter-group differences. Variables that follow a normal distribution (circumferential strain, short-axis radial velocity, short-axis radial strain, longitudinal displacement, longitudinal strain, long-axis radial displacement, long-axis radial velocity, and long-axis radial strain) should undergo the paired-samples t-test for inter-group differences.Results In the comparison between pre- and post-CABG patients, short-axis radial strain, longitudinal strain, and long-axis radial strain were significantly greater before surgery than after, with statistical significance (P < 0.05). In the comparison between post-CABG patients and the normal control group, circumferential strain, short-axis radial strain, short-axis radial strain rate, longitudinal strain, long-axis radial velocity, and long-axis radial strain were significantly greater in the control group than in post-operative patients, with statistical significance (P < 0.05). The results indicate that there has been no significant improvement in myocardial mechanical function following the surgery.Conclusions CMR-FT can accurately assess changes in myocardial mechanical function in patients before and after CABG,It has important clinical significance for guiding personalized treatment and improving patient prognosis.
[Keywords] coronary heart disease；coronary artery bypass grafting；magnetic resonance imaging；cardiac magnetic resonance feature tracking technology；myocardial mechanical function

BAN Chao   MA Xueying   WANG Jian   WANG Xin   QIAN Xinyu   CHAI Shengjie   NIU Ruilong   GE Lihong*  

Imaging Diagnosis Department, the Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China

Corresponding author: GE L H, E-mail: Lchest@126.com

Conflicts of interest   None.

Received  2024-08-20
Accepted  2025-02-10
DOI: 10.12015/issn.1674-8034.2025.02.005
Cite this article as: BAN C, MA X Y, WANG J, et al. Comparative study of myocardial mechanical function changes before and after coronary artery bypass grafting using cardiac magnetic resonance feature tracking technique[J]. Chin J Magn Reson Imaging, 2025, 16(2): 29-34, 43. DOI:10.12015/issn.1674-8034.2025.02.005.

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