冠狀動脈CT成像課件

冠狀動脈CT成像冠狀動脈CT成像冠狀動脈CT成像SinoatrialarteryAnteriorrightLeftcoronarya.atrialbranchofrightrya.CircumflexbranchofleftcoronaryaRightGreatcoronarycardiacvAnteriorAnteriorcardiacvinterventricularbranchofleftcardiacvcoronaryaRightmarginalbranchofrightcoronarya.SternocostalsurfaceSinoatrialaobli(superiorvenaofleftatriumcavabranch)GreatcadiacvSinoatrialCircumflexbranchofleftcoronarya.CoronarysinuscardiacyPosteriorleftventricularbranchRighterIorvPosteriorventricleinterventricularbranchofrightcoronarya.cardiacvRightmarginalbranchDiaphragmaticsurfaceSinoatrialarteryAnteriorrightLeftcoronarya.atrialbranchofrightrya.CircumflexbranchofleftcoronaryaRightGreatcoronarycardiacvAnteriorAnteriorcardiacvinterventricularbranchofleftcardiacvcoronaryaRightmarginalbranchofrightcoronarya.SternocostalsurfaceSinoatrialaobli(superiorvenaofleftatriumcavabranch)GreatcadiacvSinoatrialCircumflexbranchofleftcoronarya.CoronarysinuscardiacyPosteriorleftventricularbranchRighterIorvPosteriorventricleinterventricularbranchofrightcoronarya.cardiacvRightmarginalbranchDiaphragmaticsurface定義心臟的形狀如一倒置的、前后略扁的圓錐體,如將其視為頭部,則位于頭頂部、幾乎環(huán)繞心臟一周的冠狀動脈恰似一頂王冠,這就是其名稱由來左右冠狀動脈是升主動脈的第一對分支。前面觀后面觀冠脈解剖及生理特點血管內(nèi)徑細(分支和遠端血管直徑<3mm)走行遷曲,分支繁多血流速度快,相對血流量力附著心臟表面,隨心臟搏云左冠狀動脈左冠狀動脈為一短千,發(fā)自左主動脈竇,經(jīng)肺動脈起始部和左心耳之間,沿冠狀溝向左前方行3~5mm后,立即分為前室間支(前降支)和旋支,二者之間常發(fā)出對角支,可為一或兩支。降支脈圓緋室間隔支前室間支(前降支):沿前室間溝下行,繞過心尖至心的膈面與右冠狀動脈的后室間支(后降支)相吻合。沿途發(fā)出:(1)動脈圓錐支,分布至動脈圓錐;(2)左室前支,分布于左室前壁大部及前室間溝附近的右室前壁;(3)室間隔支,分布于室間隔前2/3。前降支脈圓錐支左室前支室間隔賣旋支:沿冠狀溝左行,發(fā)出左緣支分布于左室外側(cè)緣;至心后面時發(fā)出較小的分支分布至左房與左室。旋支左