运用双源CTA探讨左冠状动脉分支夹角与左前降支斑块的关系

摘要

Objective To explore the potential relationship between left coronary bifurcation angle and plaques forming in left anterior descending artery by dual-source CT angiography.Methods One hundred patients who underwent dual-source CT angiography in our hospital from January to May during 2016 and had plaques in left anterior descending artery were retrospectively studied,while 100 patients with normal image were as negative controls.There were 57 male and 43 female at the mean age of (57.54 ±-8.38) years in negative controls,and 64 male and 36 female at the mean age of (62.08 ± 13.94) years in patients with left anterior descending artery plaques.The left coronary bifurcation angle was measured by multi-planar reconstruction (MPR) and maximum density projection (MIP) techniques.Results The left coronary bifurcation angle in negative control group were range from 41.25°to 112.14°,at the mean age of 69.45 ° ± 18.71 °,while range from 54.14 ° to 128.12 o,at the mean age of 85.65 °-± 15.96 ° in plaque group.The bifurcation angle in plaque group was larger than those in negative control group(P ＜ 0.05).Conclusion Dual-source CTA could objectively evaluate left coronary bifurcation angle and plaque character.The left coronary bifurcation angle had an important influence on the formation of left anterior descending artery plaque.%目的 运用双源CT血管成像(CTA)探讨左冠状动脉分支夹角与左前降支斑块间的潜在关系.方法 从笔者医院2016年1～5月进行冠状动脉CTA检查患者中,随机选取100例冠状动脉正常组和100例左前降支斑块组(支架置入术后复查、搭桥术后复查、心肌桥、冠状动脉起源异常患者除外)进行回顾性分析,分析结果由2名医生共同确定.100例冠状动脉正常组中,男性57例,女性43例,患者年龄为48～72岁,平均年龄57.54±8.38岁.100例左前降支斑块患者,其中男性64例,女性36例,患者年龄为41～ 86岁,平均年龄62.08±13.94岁.采用多平面重建(MPR)、最大密度投影(MIP)等技术测量左冠状动脉分支夹角,探讨其与左前降支斑块的关系.结果 冠状动脉正常组左冠状动脉分支夹角范围41.25°～112.14°,平均夹角69.45°±18.71°,左前降支斑块组左冠状动脉分支夹角范围54.14°～ 128.12°,平均夹角85.65°±15.96°,两组比较,左前降支斑块组左冠状动脉分支夹角大于冠状动脉正常组(P＜0.05).结论 双源CTA可以无创、客观评价左冠状动脉分支夹角及左前降支斑块病变,左冠状动脉分支夹角对左前降支斑块的形成具有重要影响.