双源CT评价冠状动脉支架内再狭窄的意义

Significance of dual-source CT evaluate coronary-stent restenosis

目的:通过双源CT(DSCT)与选择性冠状动脉造影(CAG)对支架评估的对比分析,探讨DSCT对冠状动脉支架内再狭窄的诊断意义。方法:42例同期行双源CT冠状动脉血管成像及选择性CAG检查的患者,分析比较DSCT诊断支架内再狭窄的敏感性、特异性及准确性。结果:①DSCT按病例数诊断支架内再狭窄的敏感性86.7%、特异性96.2%、阳性预测值92.9%、阴性预测值92.6%、准确性92.7%。②DSCT按支架数诊断支架内再狭窄的敏感性76.5%、特异性95.1%、阳性预测值86.7%、阴性预测值90.7%、准确性89.7%。③DSCT与CAG比较,诊断支架内再狭窄的差异无统计学意义。④DSCT对直径≥3.0mm支架的再狭窄检出的阳性预测值、特异性、敏感性均优于直径<3.0mm支架。结论:双源CT在诊断支架内再狭窄方面接近CAG,可作为支架内再狭窄的评估手段之一。

Objective：TO investigate the diagnosis value of in-stent restenosis with dual-source CT（DSCT）by comparative of dual-source CT（DSCT）and coronary angiography（CAG）.Method：The 42cases underwent dualsource CT coronary angiography and coronary angiography,analysis and comparison in-stent restenosis of DSCT diagnostic sensitivity,specificity and accuracy.Result：①By calculated the number of people,the sensitivity,specificity,positive and negative predictive value,accuracy of DSCT diagnose in-stent restenosis were 86.7%,96.2%,92.9%,92.6%and 92.7%.②By calculated the number of stent,the sensitivity,specificity,positive and negative predictive value,accuracy of DSCT diagnose in-stent restenosis were 76.5%,95.1%,86.7%,90.7%and 89.7%.③DSCT compared with CAG diagnosis in-stent restenosis was no significant difference.④The detection with DSCT in-stent restenosis of positive predictive value,specificity and sensitivity in diameter≥3.0mm stents were better than the diameter of3.0mm stents.Conclusion：The dual-source CT in the diagnosis of in-stent restenosis area is close to the CAG,DSCT can be a means in assessing of in-stent restenosis.