【摘要】 目的通过冠状动脉CT血管成像(CCTA)初步探究右冠状动脉(RCA)起始部-主动脉夹角与RCA斑块成分及狭窄程度的关系。方法连续纳入631例于我院行CCTA检查患者进行回顾性分析,根据RCA起始部有无斑块将其分为正常组(n=279)和斑块组(n=352),斑块组基于不同斑块成分CT值的不同,进一步分为钙化斑块组(n=72)、非钙化斑块组(n=181)及混合斑块组(n=99)。根据RCA有无狭窄分为无狭窄组(n=383)及狭窄组(n=248),狭窄组进一步分为<50%狭窄组及≥50%狭窄组。比较正常组与不同斑块成分各组之间、无狭窄组及不同狭窄程度各组之间RCA起始部-主动脉夹角的差异。结果正常组男性RCA起始部-主动脉夹角明显大于女性(P<0.05)。非钙化斑块组、混合斑块组RCA起始部-主动脉夹角小于正常组(P<0.05),钙化斑块组与其他各组相比差异均无统计学意义。与无狭窄组比较,<50%狭窄组及≥50%狭窄组RCA起始部-主动脉夹角均减小(P<0.05),<50%狭窄组及≥50%狭窄组RCA起始部-主动脉夹角差异无统计学意义。结论 RCA起始部-主动脉夹角较小时,易形成非钙化及混合斑块,平扫CT如发现RCA起始部-主动脉夹角较小时则提示RCA存在斑块及狭窄可能。更多还原

【Abstract】 ObjectiveTo preliminary investigate the relationship between right coronary artery(RCA) origin-aorticangle, RCA plaque composition and coronary artery stenosis by coronary CT angiography(CCTA).MethodsA total of 631 consecutive patients undergoing CCTA examination in our hospital were retrospectively analyzed. According to the presenceor absence of RCA plaques, patients were divided into normal group(n=279) and plaque group(n=352). The plaque groupwas further divided into calcified group(n=72), non-calcified group(n=181) and mixed plaque group(n=99) based on thedifferent CT values of different plaque components. According to the presence or absence of RCA stenosis, the patients weredivided into non-stenosis group(n=383) and stenosis group(n=248). The stenosis group was further divided into <50%stenosis group and ≥50% stenosis group. The differences of the RCA origin-aortic angle were compared between normalgroup and plaque groups, and between no stenosis group and stenosis groups.ResultsIn the normal group, the angle of theRCA origin-aorta was significantly larger in males than that of females(P<0.05). The RCA origin-aortic angles of non-calcified plaque group and mixed plaque group were both smaller than that of normal group(P<0.05). There were nosignificant differences in RCA origin-aortic angles between calcified plaque group and the other groups. Compared with non-stenosis group, the angles of RCA origin-aorta were reduced in both the <50% stenosis group and ≥50% stenosis group(P<0.05). There was no statistically significant difference in the RCA origin-aortic angle between the <50% stenosis groupand ≥50% stenosis group.ConclusionNon-calcified and mixed plaques are prone to form when the angle between theRCA origin and the aorta is smaller. If the plain CT scan shows that the angle is smaller, it indicates that plaque and stenosismay exist in the RCA.更多还原