心律失常患者64层螺旋CT冠状动脉成像个性化优化扫描研究

摘要

Objective To explore the value of the personalized optimizing scanning technique of 64 multislice CT(MSCT)in coronary artery scanning of several common forms of cardiac arrhythmia.Methods 226 patients diagnosed as cardiac arrhythmia were selected to be examined by 64 MSCT.To contrast the coronary image quality of primitive coronaries and optimizing ones and to judge if there was significant importance.Results There were significant importance between the primitive coronaries and optimatic ones.(P＜0.05).Comparing CTA with DSA,the sensitivity,specificity, positive predictive value and negative predictive value were 79.5％ , 98.4％ , 77.3％ , 97.0％ respectively when the coronary stenosis of CTA＜50％ and the sensitivity, specificity, positive predictive value and negative predictive value were 77.1％ , 98.9％ , 74.8％ , 99.2％ respetively when the coronary stenosis of CTA≥50％.Conclusion The personalized optimatic scanning technique of 64 ( MSCT) can effectively decrease the effects of cardiac ar thythmia to coronary artery scanning and improve the coronary image quality.%目的 探讨64层螺旋CT血管成像(CTA)个性化扫描技术在几种常见心律失常患者中的应用价值.方法 收集心律失常患者226例,进行CTA检查,将原始冠状动脉图像与经过个性化重组技术处理后冠状动脉图像相对照,同时将行CTA、数字减影血管造影(DSA)评价的冠状动脉狭窄程度相比较,计算出特异性、敏感性、阳性预测值及阴性预测值.结果 个性化重组后各组心律失常患者可评价冠状动脉血管段与重组前相比明显增多(P＜0.05),与冠状动脉造影相比较,冠状动脉狭窄小于50%时,冠状动脉狭窄诊断的敏感度为79.5%,特异度为98.4%,阳性预测值为77.3%,阴性预测值为97.0%.冠状动脉狭窄大于或等于50%时,冠状动脉狭窄诊断的敏感度为77.1%,特异度为98.9%,阳性预测值为74.8%,阴性预测值为99.2%.结论 运用64层螺旋CT个性化重组技术能够有效地防止心律失常对冠状动脉扫描的影响,提高冠状动脉成像质量.