心率对Revolution CT心肌桥-壁冠状动脉形态学评价和辐射剂量影响的分析  

Analysis of the impact of heart rate on morphology of coronary artery myocardial bridge and radiation dose using Revolution computed tomography coronary angiography

作　　者：钟智 曾伟华 欧阳欣 李雄 刘慧 左志超 吴彦平 唐云波 ZHONG Zhi;ZENG Wei-hua;OUYANG Xin;LI Xiong;LIU Hui;ZUO Zhi-chao;WU Yan-ping;TANG Yun-bo(Department of Radiology,Xiangtan Central Hospital,Xiangtan 411100,China;Department of Cardiology,Xiangtan Central Hospital,Xiangtan 411100,China)

机构地区：[1]湖南省湘潭市中心医院放射科,湖南湘潭411100 [2]湖南省湘潭市中心医院心内科,湖南湘潭411100

出　　处：《实用医院临床杂志》2022年第1期68-70,共3页Practical Journal of Clinical Medicine

基　　金：湖南省湘潭市医学科研基金资助项目(编号:2020xtyx-27)。

摘　　要：目的探讨实时心率对Revolution CT单个心动周期心肌桥-壁冠状动脉(MB-MCA)形态学的可诊断性及有效辐射剂量(ED)。方法收集经Revolution CT冠状动脉成像检出左前降支MB-MCA受检者154例,记录即时心率分为Ⅰ~Ⅳ组,Ⅰ组43例(<70 bpm),Ⅱ组41例(70~80 bpm),Ⅲ组37例(81~90 bpm),Ⅳ组33例(>90 bpm)。评价各组间MB-MCA的形态学及可诊断性,并分析ED的差异。结果Ⅰ~Ⅳ组间MB-MCA的形态学主观总评分比较,差异有统计学意义(P<0.05),MB-MCA的可诊断率比较,差异无统计学意义(P>0.05),ED分别为(2.04±0.75)mSv、(3.42±1.57)mSv、(2.67±1.00)mSv、(3.59±1.44)mSv,差异有统计学意义(P<0.001)。结论实时心率Revolution CT单个心动周期MB-MCA形态学评估可满足临床诊断,提高MB-MCA可诊断率的同时降低了辐射剂量。Objective To explore the diagnosability and effective radiation dose(ED)of Revolution CT in single cardiac cycle at real-time heart rate(HR)for morphology of myocardial bridge and mural coronary artery(MB-MCA).Methods Data of MB-MCA of left anterior descending branch detected by Revolution CT in 154 patients were collected.According to their real-time HR,the patients were divided into group I(HR<70 bpm,n=43),group II(HR=70~80 bpm,n=41),group III(HR=81~90 bpm,n=37),and group IV(HR>90 bpm,n=33).The morphology and diagnosability of MB-MCA were evaluated and the differences in ED were analyzed in the four groups.Results There was a significant difference in the morphological subjective total score of MB-MCA between groups I to IV(P<0.05).However,there was no significant different in the diagnosability of MB-MCA(P>0.05).The ED were(2.04±0.75),(3.42±1.57),(2.67±1.00)and(3.59±1.44)mSv in the four groups,respectively(P<0.001).Conclusion The evaluation of morphology of MB-MCA by Revolution CT real-time HR in single cardiac cycle could meet the clinical diagnose.It improves the diagnostic rate of MB-MCA and reduces the radiation dose at the same time.

关 键 词：心率 Revolution CT 心肌桥-壁冠状动脉 辐射剂量 

分 类 号：R445.3[医药卫生—影像医学与核医学]