CAJ | 학술논문

目的应用血流向量成像技术观察左室内涡流的形成及演变情况,评价扩张型心肌病(DCM)的左心室功能.方法选取DCM患者26例、正常对照44例为观察对象,采集左室内血流向量图像,观察心动周期中不同时相涡流的位置、大小、圈数分布及其演变规律.结果 ①正常对照组缓慢射血期和等容舒张期左室内未见涡流形成,舒张期涡流多位于二尖瓣前叶附近,左室中上部1/3,形态多变(变化2～3次);涡流横径、纵径和圈数在心动周期的7个时相之间有差异.②DCM组心动周期7个时相均有涡流出现,舒张期出现涡流更靠近左室中下2/3,向心尖部靠近,相对正常人而言,DCM组在同一时相出现的涡流形态、部位变化更多(4～5次);心动周期的各个时相中DCM组左室内涡流的横径、纵径和圈数均大于正常对照组.DCM组涡流大小和圈数在心动周期的7个时相之间也有差异.结论血流向量成像技术可以显示在体的左室内涡流变化情况,DCM患者左室内涡流大小及圈数均大于正常人.
목적 응용혈류향량성상기술관찰좌실내와류적형성급연변정황,평개확장형심기병(DCM)적좌심실공능.방법 선취DCM환자26례、정상대조44례위관찰대상,채집좌실내혈류향량도상,관찰심동주기중불동시상와류적위치、대소、권수분포급기연변규률.결과 ①정상대조조완만사혈기화등용서장기좌실내미견와류형성,서장기와류다위우이첨판전협부근,좌실중상부1/3,형태다변(변화2～3차);와류횡경、종경화권수재심동주기적7개시상지간유차이.②DCM조심동주기7개시상균유와류출현,서장기출현와류경고근좌실중하2/3,향심첨부고근,상대정상인이언,DCM조재동일시상출현적와류형태、부위변화경다(4～5차);심동주기적각개시상중DCM조좌실내와류적횡경、종경화권수균대우정상대조조.DCM조와류대소화권수재심동주기적7개시상지간야유차이.결론 혈류향량성상기술가이현시재체적좌실내와류변화정황,DCM환자좌실내와류대소급권수균대우정상인.
Objective To evaluate left ventricular function in the way of intracavitary vortex by vector flow mapping(VFM),and to demonstrate the formation and variation of the vortex. Methods Twenty-six patients with dilated cardiomyopathy(DCM) and 44 healthy controls were involved. The velocity distribution imagings on the section plane of the flow in the left ventricle were obtained by VFM, the location of the vortex and its variation in every phase of cardiac cycle were focused,and series parameters were measured,such as the diameter of the vortex (transverse diameter, vertical diameter), number of the vertex. Results relaxation(e) period. Vortices were observed mostly during diastolic period, nearby the anterior leaflet of mitral valve,middle upper 1/3 of left ventricle,and their shapes changed 2 - 3 times. The diameters of the vortex (transverse diameter,vertical diameter) , number of the vertices in one cardiac cycle during 7 phases mostly nearby the cardiac apex, middle lower 2/3 of left ventricle, and their shapes changed 4 - 5 times.Compared with control group,the diameters of the vortex (transverse diameter, vertical diameter) during 7 phases in DCM group were bigger,and number of the vertices were more ( P ＜0.01 ). The diameters of the vortex (transverse diameter, vertical diameter), number of the vertices within DCM group in one cardiac cycle during 7 phases were significantly different ( P ＜ 0.01 ). Conclusions VFM can demonstrate the variation of intracavitary vortex. Vortex in DCM group were significantly bigger than those of control group.