冠状动脉CT成像课件

冠状动脉CT成像冠状动脉CT成像冠状动脉CT成像SinoatrialarteryAnteriorrightLeftcoronarya.atrialbranchofrightrya.CircumflexbranchofleftcoronaryaRightGreatcoronarycardiacvAnteriorAnteriorcardiacvinterventricularbranchofleftcardiacvcoronaryaRightmarginalbranchofrightcoronarya.SternocostalsurfaceSinoatrialaobli(superiorvenaofleftatriumcavabranch)GreatcadiacvSinoatrialCircumflexbranchofleftcoronarya.CoronarysinuscardiacyPosteriorleftventricularbranchRighterIorvPosteriorventricleinterventricularbranchofrightcoronarya.cardiacvRightmarginalbranchDiaphragmaticsurfaceSinoatrialarteryAnteriorrightLeftcoronarya.atrialbranchofrightrya.CircumflexbranchofleftcoronaryaRightGreatcoronarycardiacvAnteriorAnteriorcardiacvinterventricularbranchofleftcardiacvcoronaryaRightmarginalbranchofrightcoronarya.SternocostalsurfaceSinoatrialaobli(superiorvenaofleftatriumcavabranch)GreatcadiacvSinoatrialCircumflexbranchofleftcoronarya.CoronarysinuscardiacyPosteriorleftventricularbranchRighterIorvPosteriorventricleinterventricularbranchofrightcoronarya.cardiacvRightmarginalbranchDiaphragmaticsurface定义心脏的形状如一倒置的、前后略扁的圆锥体,如将其视为头部,则位于头顶部、几乎环绕心脏一周的冠状动脉恰似一顶王冠,这就是其名称由来左右冠状动脉是升主动脉的第一对分支。前面观后面观冠脉解剖及生理特点血管内径细(分支和远端血管直径<3mm)走行迁曲,分支繁多血流速度快,相对血流量力附着心脏表面,随心脏搏云左冠状动脉左冠状动脉为一短千,发自左主动脉窦,经肺动脉起始部和左心耳之间,沿冠状沟向左前方行3~5mm后,立即分为前室间支(前降支)和旋支,二者之间常发出对角支,可为一或两支。降支脉圆绯室间隔支前室间支(前降支):沿前室间沟下行,绕过心尖至心的膈面与右冠状动脉的后室间支(后降支)相吻合。沿途发出:(1)动脉圆锥支,分布至动脉圆锥;(2)左室前支,分布于左室前壁大部及前室间沟附近的右室前壁;(3)室间隔支,分布于室间隔前2/3。前降支脉圆锥支左室前支室间隔卖旋支:沿冠状沟左行,发出左缘支分布于左室外侧缘;至心后面时发出较小的分支分布至左房与左室。旋支左