心脏磁共振特征追踪技术对冠状动脉旁路移植术前后心肌力学功能改变的对比研究  

Comparative study of myocardial mechanical function changes before and after coronary artery bypass grafting using cardiac magnetic resonance feature tracking technique

作　　者：班超 马雪英 王坚[1] 王欣[1] 钱昕毓 柴圣杰 牛瑞龙 葛丽红[1] 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)

机构地区：[1]内蒙古医科大学附属医院影像诊断科,呼和浩特010050

出　　处：《磁共振成像》2025年第2期29-34,43,共7页Chinese Journal of Magnetic Resonance Imaging

基　　金：内蒙古自治区科技计划项目(编号:202202154)。

摘　　要：目的探讨心脏磁共振特征追踪(cardiac magnetic resonance imaging feature tracking,CMR-FT)技术对冠状动脉旁路移植术(coronary artery bypass grafting,CABG)前后患者心肌力学功能改变的应用价值。材料与方法选取接受CABG治疗的冠心病(coronary heart disease,CHD)患者35例,同时招募35名健康志愿者作为对照组进行CMR-FT检查,通过人工智能技术自动测量心肌力学功能并人工校准,使用CMR-FT对左心室的心肌力学功能进行分析并得到相关参数。使用Shapiro-Wilk检验分析变量的正态分布性,不服从正态性分布的变量(周向位移、周向速度、周向应变率、短轴径向位移、短轴径向应变率、纵向速度、纵向应变率、长轴径向应变率)组间差异分析行Wilcoxon秩和检验;服从正态分布的变量(周向应变、短轴径向速度、短轴径向应变、纵向位移、纵向应变、长轴径向位移、长轴径向速度、长轴径向应变)组间差异行配对样本t检验。结果在患者行CABG术前术后的对比试验中,短轴径向应变、纵向应变、长轴径向应变术前大于术后,差异有统计学意义(P<0.05),在CABG术后患者与正常对照组患者的对比试验中,周向应变、短轴径向应变、短轴径向应变率、纵向应变、长轴径向速度、长轴径向应变对照组大于术后,差异有统计学意义(P<0.05)。结果表明,术后心肌力学功能未出现显著改善。结论CMR-FT能够准确评估CABG前后患者心肌力学功能的变化情况,对指导个性化治疗、提升患者预后具有重要临床意义。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 indic

关 键 词：冠心病 冠状动脉旁路移植术 磁共振成像 心脏磁共振特征追踪技术 心肌力学功能 

分 类 号：R445.2[医药卫生—影像医学与核医学] R541.3[医药卫生—诊断学]