室性早搏对冠状动脉成像的影响

Influence of premature ventricular contractions on coronary DSCT

目的探讨室性早搏对双源CT冠状动脉成像(DSCTA)图像质量的影响。方法对33例实施冠状动脉DSCTA过程中出现室性早搏的病例(室早组)进行回顾性分析;39例窦性心律患者作为对照(对照组)。室早组患者按早搏发作频次分为低发组(≤2次)和高发组(>2次)。冠状动脉图像采用4分法进行图像质量评分。结果室早组患者总体图像质量评分明显低于对照组(P<0.01),仅55.3%的冠状动脉段达到诊断要求。室早患者高发组总体图像质量评分低于低发组(P<0.01)。结论室性早搏对冠状动脉DSCTA有较为严重的影响,成像质量与室早发作频次、冠状动脉在波及层面中的位置和走行等有关。

Objective To investigate the effects of premature ventricular contraction（PVS） on coronary dual-source CT angiography（DSCT）.Methods Thirty-three patients with PVS underwent coronary DSCT（group PVC） were retrospectively analyzed and 39 cases with sinus cardiac rhythm（group C） were taken as the controls.According to the number of PVS appeared on ECG,the patients with PVC were subdivided into two groups of P1（PVC≤2） and P2（PVC2）.Each coronary segment was assessed by four-score method.Results The scores of image quality were significantly higher in group PVS than those in group C（P0.01）,which were lower in group P1 than those in group P2（P0.01）.Only 55.3% of the coronary segments met the diagnostic requirements in group PVC.Conclusion PVS has negative effect on image quality of coronary DSCT in PVC patients.The Image quality is related to the number of PVC and its trace.