Purpose To analyze the application effect of adaptive prospective ECG-triggered scan in arrhythmia undergoing coronary CT angiography.Materials and Methods 124 patients with arrhythmia in Xuanwu Hospital,Capital Medical University from May 2017 to May 2020 were selected and randomly divided into two groups,58 cases in control group were treated with retrospective ECG gated coronary artery examination,and 66 cases in study group were treated with prospective ECG triggered scanning.The diagnosis results,image quality score,contrast agent and radiation dose between the two groups were compared,respectively.Results The diagnostic accuracy of patients in both groups was above 95%,and the difference was not statistically significant(P>0.05).The image quality of the left anterior descending artery,right circumflex artery and right coronary artery in the study group was consistent with that of the control group,and the average subjective scores were 4.16 vs.4.07,3.98 vs.4.22,and 4.03 vs.4.01,respectively.However,the contrast medium and the effective radiation dose were all significantly lower than that of the control group(t=32.811 and 9.119,P=0.001),with a 29%and 39%reduction,respectively.Conclusion For patients with arrhythmia,the narrow window technique of prospective ECG trigger scanning ensures the image quality of coronary artery imaging and has comparable diagnostic accuracy to conventional retrospective scanning,while improving the safety of the examination and reducing the radiation dose.
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