320排CT双低成像对冠脉支架植入后评价

Evaluation of 320-slice CT Double-low Imaging on Coronary Stent Implantation

目的探讨320排CT双低成像对冠脉支架植入术后支架内再狭窄(in-stent restenosis,ISR)的评估价值。方法方便选取该院2015年4月—2017年1月收治的接受冠状动脉支架植入术后患者42例(64枚支架),所有患者均行320排CT双低成像并于1个月内接受常规冠脉造影(CAG)检查,以CAG检查结果为参照,评价320排CT双低成像技术诊断冠状动脉支架植入术后再狭窄的准确性。结果 320排CT双低成像诊断冠脉支架植入术后ISR的敏感度、特异度、准确率、阳性预测值及阴性预测值分别为100.00%、95.65%、96.49%、84.62%、100.00%。该组患者的心率为(65.20±4.79)bpm/min,剂量长度乘积(DLP)为(98.22±32.54)m Gy.cm,有效辐射剂量(ED)为(1.34±0.42)m Sv。结论320排CT双低成像评价冠脉支架植入术后支架内再狭窄准确度较高,能减少有效辐射剂量,具有重要的应用价值。

Objective This paper tries to evaluate the value of 320-slice CT double-low imaging in in-stent restenosis（ISR） after coronary stent implantation. Methods 42 patients（64 stents） treated with coronary stent implantation in this hospital from April to January 2017 were selected. All patients underwent 320-slice CT double-low imaging and received conventional coronary angiography（CAG） within 1 month. The accuracy of 320-slice CT double low-imaging technique in the diagnosis of restenosis after coronary stent implantation was evaluated by CAG test. Results The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of 320-slice CT double-low imaging in the diagnosis of restenosis after coronary stent implantation were 100.00%, 95.65%, 96.49%, 84.62%, 100.00%. The heart rate was（65.20±4.79）bpm/min, the dose length product（DLP） was（98.22±32.54）m Gy.cm, and the effective radiation dose（ED） was（1.34±0.42）m Sv. Conclusion 320-slice CT double-low imaging is effective in assessing restenosis after coronary stent implantation, which can reduce the effective radiation dose and has important application value.