速度向量成像和多层螺旋CT冠状动脉成像对冠状动脉搭桥术后心功能的评价

目的探讨多层螺旋CT冠状动脉造影(CTA)和速度向量成像技术(VVI)联合诊断冠状动脉搭桥术(CABG)前后左室局部心肌功能的变化,判断手术疗效。方法 28例CABG患者,于术前7d分别完成多层螺旋CTA及VVI技术检查,同时,根据有无心肌梗死病史和室壁运动情况将全组患者分为2组:心肌梗死12例,非心肌梗死16例。并于术前7d,术后7d、3个月测定左室各节段的收缩期应变率(SRs)。同时分析CTA与相应室壁节段VVI的相关性。结果无心梗组术后SRs明显增加(P<0.05),心梗组术后SRs与手术前比较差异无统计学意义(P>0.05)。CTA与相应室壁节段SRs比较具有很好的一致性(γ=0.963,P<0.05)。结论多层螺旋CTA和VVI技术联合使用,互相补充,可方便、全面、无创地评价CABG术前检查及术后长期随访。

A comparative study between multi-slice CTA and velocity vector imaging on evaluation function before and after coronary artery bypass graft

Objective To evaluate left ventricular regional systolic myocardial function before and after coronary artery bypass graft(CABG) by multi-slice spiral CTA and velocity vector imaging(VVI),and determine the effect of CABG.Methods All the 28 patients with coronary artery disease were underwent multi-slice spiral CTA and velocity vector imaging(VVI) before CABG.According to the history of myocardial infarction and ventricular wall motion,28 patients were divided into two groups: Group I(16 case) involved patients with no history of myocardial infartion;Group II(12 case) included patients with history of myocardial infartion.The values of systolic strain rate(SRs) were measured in study group at 7d before CABG and 7d,3months after CABG.Results After CABG the values of SRs were increased significantly(P<0.05) compared with preoperation in group I.On the contrary there were no significant changes of SRs(P<0.05) in group II.Multi-slice spiral CTA had high consistency with velocity vector imaging(VVI)(r=0.963,P<0.05).Conclusion Both multi-slice spiral CTA and velocity vector imaging(VVI) are valuable in evaluating the effect of CABG.Using the two methods combinatively we can assess CHD conveniently,completely,accurately and non-invasively.