摘要
目的 探讨口服酒石酸美托洛尔降低心率对640层CT冠状动脉造影检查辐射剂量的影响.资料与方法 收集行冠状动脉CTA检查的60例患者,患者静息心率均≥80次/min,检前口服25～50 mg酒石酸美托洛尔,根据扫描时患者心率分为3组,A组心率＜65次/min,B组心率65～80次/min,C组心率80～90次/min,每组各20例.对各组的图像质量评分、辐射剂量（ED）进行统计分析.结果 A组图像质量评分高于B、C组,差异无统计学意义（t=0.370、0.717,P＞0.05）.A、B组ED分别比C组降低72.1％、44.6％,A组与B组、A组与C组、B组与C组ED比较差异均有统计学意义（t=-44.171、-29.051、-19.010,P＜0.05）.结论 640层CT冠状动脉造影检查前口服酒石酸美托洛尔在降低心率的同时可以有效降低患者的ED.
PurposeTo explore the effect of Metoprolol Tartrate oral taking on theradiation dose of coronary CT Angiography examination on 640-slice CT by slowingdown the heart rate. Materials and Methods Sixty patients with rapid heart rate （morethan 80 beats/min） were given 25-50 mg Metoprolol Tartrate prior to coronary CTA scan,all the subjects were divided into three groups with 20 cases in each group according totheir heart rates during the scan group A： heart rate less than 65 beats/min, group B： heartrate between 65 beats/min and 80 beats/min, group C： heat rate between 80 beats/minand 90 beats/min. The differences of image quality and effective dose between differentgroups were statistically analyzed. Results Image quality of group A was higher than thatof group B and group C, but the difference was not statistically significant （t=0.370, 0.717;P〉0.05）. Compared with group C, the effective radiation dose of group A and group B waslower down for 72.1% and 44.6%, statistical significant differences were observed betweengroup A and group B, group A and group C, and group B and group C （t=-44.171,- 29.051, -19.010; P〈0.05）. Conclusion Patients＇ heart rate and effective radiationdose can be effectively reduced by taking Metoprolol Tartrate before undergoing coronaryCTA with 640-slice CT.
出处
《中国医学影像学杂志》
CSCD
北大核心
2014年第2期139-141,共3页
Chinese Journal of Medical Imaging
