The influence of cardiac rhythm on image quality of 64-slice spiral CT in coronary angiography and the value of ECG editing in arrhythmias / 重庆医科大学学报

ABSTRACT

Objective:To analyze the influence of cardiac rhythm on image quality in coronary angiography with 64-slice spiral CT and to investigate the value of ECG editing in improving the image quality of arrhythmias.Methods:A retrospective study was undertaken in 112 cases which had 64-spiral CT scan in coronary angiography.The 112 cases were divided into 4 groups according to the heart rate fluctuation.Group A 0～4 bpm,Group B 5～9 bpm,Group C 10～14 bpm,and Group D≥15 bpm.The image qualities of brands or segments of coronary arteries(total 1 118)were compared between different groups;26 patients with previously known arrhythmia or arrhythmia merely occurring during the examination,their coronary angiographies were obtained respectively using original synchronously record ECG or using the ECG after being edited with the ECG editing software.The image quality was compared before and after the editing.Results:There was no significant difference between group A、B and C except RCA2,but the difference between group D and A、B、C was obvious(P