Abstract
目的 评介64层螺旋CT诊断冠状动脉支架内再狭窄(ISR)的临床价值.方法 采用64层螺旋CT对14例冠状动脉支架置入术后的患者(共37个支架)进行CT冠状动脉成像(CTA).在CTA上,通过肉眼观察和测量支架内CT值两种方法诊断ISR.以冠状动脉造影(ISR≥50%)为标准,计算并比较两种方法诊断ISR的准确性.结果 37个支架中,CCA检出ISR(≥50%)11个,正常(包括ISR<50%)26个.与CCA对照,CTA肉眼观察法正确诊断ISR 2个,正常18个,CT值测量法则分别正确诊断ISR 3个,正常21个.两种方法诊断ISR的敏感性、特异性、阳性预测值和阴性预测值分别为18%、69%、20%、67%和27%、81%、38%、72%.两种方法各项准确性指标之间差异均无统计学意义(P>0.05).结论 64层螺旋CT诊断ISR十分困难,但对排除ISR有一定的作用。
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