（五）小结

综上所述，侧支血管选择是逆向CTO PCI手术成功的基石。术者应仔细阅片，首先关注侧支血管相关的解剖特征（侧支类型、侧支迂曲程度、侧支直径、侧支长度、侧支起源与汇入部位的解剖条件、侧支通路是否存在分支血管），同时还需评估各个“可利用”侧支的手术风险（缺血风险和损伤分析）。在逆向CTO PCI过程中，心血管介入医师只有兼顾到手术效率和患者安全，理性选择最佳侧支通路，才能真正提高逆向CTO PCI的手术成功率，增加患者的临床获益。

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