JACC:光学相干断层扫描(OCT)诊断严重冠脉狭窄效能适中

2012-04-06 范伟伟 医学论坛网

 《美国心脏病学会杂志》(J Am Coll Cardiol)杂志近期在线发表了西班牙学者的一项研究,证实对于伴血流动力学障碍的严重冠状动脉狭窄,光学相干断层扫描(OCT)的诊断效能适中。尽管在功能性狭窄评估方面,OCT 较血管内超声(IVUS)略显优势(尤其对于直径<3mm血管),但OCT较低的特异性决定其在功能性狭窄评估上不可取代血流储备分数(FFR)。   OCT对狭窄严重程度的诊

 《美国心脏病学会杂志》(J Am Coll Cardiol)杂志近期在线发表了西班牙学者的一项研究,证实对于伴血流动力学障碍的严重冠状动脉狭窄,光学相干断层扫描(OCT)的诊断效能适中。尽管在功能性狭窄评估方面,OCT 较血管内超声(IVUS)略显优势(尤其对于直径<3mm血管),但OCT较低的特异性决定其在功能性狭窄评估上不可取代血流储备分数(FFR)。

  OCT对狭窄严重程度的诊断价值尚不明确。该研究试图评估OCT对伴血流动力学障碍的严重冠状动脉狭窄(由FFR确定)的诊断价值。对一亚组患者同时行OCT和血管内超声(IVUS)检查,以比较两种方法的诊断效能。

  研究共纳入了56例经血管造影显示为严重冠状动脉狭窄(n=61)的患者。严重狭窄被定义为FFR ≤0.80。所有病例均行OCT检查,其中47例行IVUS成像检查。

  血管造影显示狭窄的严重程度为直径狭窄50.9%(最小管腔直径为1.28mm)。其中,28例(45.9%)狭窄的FFR为0.80。总体而言,OCT的诊断效率适中【曲线下面积(AUC):0.74, 95%可信区间(CI):0.61-0.84)】,灵敏度/特异度为82%/ 63%,最适临界值为1.95 mm2。对同时行IVUS和OCT成像的患者的结果进行比较,显示OCT(AUC:0.70,95%CI:0.55-0.83)和IVUS(AUC:0.63,95%CI:0.47-0.77;P = 0.19)的诊断效能无显著性差异。IVUS的灵敏度/特异度为67%/ 65%,最适临界值为2.36 mm2。对小血管(参考直径<3毫米)亚组进行的分析显示,OCT(AUC:0.77,95%CI:0.60-0.89)在识别显著的功能性狭窄方面的诊断效能显著优于IVUS(AUC:0.63,95%CI:0.46-0.78)(P = 0.04)。

链接:Gonzalo N, Escaned J, Alfonso F, Nolte C, Rodriguez V, Jimenez-Quevedo P, Bañuelos C, Fernández-Ortiz A, Garcia E, Hernandez-Antolin R, Macaya C. Morphometric Assessment of Coronary Stenosis Relevance With Optical Coherence Tomography.J Am Coll Cardiol. 2012 Mar 20;59(12):1080-9.

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    2016-07-23 午夜星河

    认真学习吧

    0

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    2012-10-08 hbwxf
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    2013-02-26 habb
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