Abstract: Coronary computed tomography angiography(CTA) has been widely applied in clinical practice,but arrhythmia has always been the bottleneck of the technology.Limited by the technological problems of multidetector spiral CT and dual-source CT,images always discontinue for the irregular cardiac rhythm.Electrocardiograph editing technology can improve image quality and diagnostic sensitivity.Wide-detector CT can rebuild the images by a single heartbeat in the case of low heart rate,which helps to eliminate artifacts,but its temporal resolution needs to be improved.