摘要
目的探讨浅表型与深在型心肌桥-壁冠状动脉(MB-MCA)形态学特征和对载MB-MCA冠状动脉粥样硬化病变有无差异。方法回顾性分析122例经128层螺旋CT冠状动脉血管成像诊断MB-MCA患者资料,由2名心血管CT诊断医师独立判断MB-MCA的存在,结果一致时诊断为MB-MCA。测量MB厚度、MCA长度及MCA狭窄近端、最窄处、远端管径,计算MCA管腔狭窄程度,记录MB-MCA位置、包绕情况、MCA两端成角情况,并记录MCA本身以及其近、远段冠状动脉粥样硬化病变情况。应用t检验和卡方检验分析两型间形态学特征和粥样硬化病变发生率有无统计学差异。结果 122例CT冠状动脉成像发现138处MB-MCA,浅表型、深在型各占69.57%(96/138)和30.43%(42/138),MCA平均长度分别为22.77±13.97mm和23.07±12.40mm,MCA管径平均狭窄程度分别为19.94±13.64%和26.62±16.47%,MCA两端单独或同时成角分别占86.46%和78.57%。两型间MCA管腔狭窄程度比较有统计学差异(P=0.01,43<0.05)。桥近段冠脉较MCA本身和远段冠脉更易于发生粥样硬化,有明显统计学差异(P<0.05),两型间各节段粥样硬化发生率分别比较无统计学差异(P>0.05)。结论 MB-MCA形态学特征与其分型无关,但MCA管腔狭窄与其类型有关,即MCA管腔狭窄程度与MB厚度有关。载MB-MCA冠状动脉近段容易发生粥样硬化,MCA及远段冠脉次之,这一特点亦与其分型无关。
Objective To evaluate the differences of between superficial myocardial bridge-mural coronary artery （MB-MCA） and deep MB-MCA with the morphological characteristics of MB-MCA and the incidence of coronary atherosclerosis. Methods The images of 122 patients who were diagnosed as MB-MCA by128-MSCT were analyzed.The length of MCA and thickness of MB and the stenosis rate of MCA were measured and calculated, and situation of MB, encasement form of MCA, adjacent vessel morphology and the distribution of atherosclerosis were observed. x2 test and t test were used to analyze measurement data between the superior MB-MCA and deep MB-MCA. Results 138 sites of MB-MCA were detected in 122 cases. superficial, deep MB-MCA in each accounted for 69.57% （96/138） and 69.57% （42/138）, average length of MCA were 22.77±13.97mm and 23.07±12.40mm, MCA average stenosis degree were 19.94±13.64% and 26.62±16.47% respectively, alone or at the same time on both ends of the MCA tortuousity accounted for 86.46%and 86.46%respectively. MCA stenosis degree between the two type was statistically significant （P=0.0143）. The overall prevalence of coronary atherosclerosis of the proximate segment of MB-MCA was 44.2%, which demonstrated significant difference with atherosclerosis of MCA itself and the distal segment, The incidence of atherosclerosis in each segment between two type was no statistical difference （P〉0.05）. Conclusion MCA stenosis degree is associated with the type of MB-MCA.MB-MCA predisposes to the development of atherosclerosis in its proximate coronary artery, which is unrelated to the type of MB-MCA.
出处
《中国CT和MRI杂志》
2015年第3期45-48,共4页
Chinese Journal of CT and MRI
关键词
心肌桥
壁冠状动脉
冠状动脉粥样硬化病变
多层螺旋CT
多层螺旋CT
Myocardial Bridge
Mural Coronary Artery
Coronary Atherosclerosis
Multi-slice Computed Tomography
