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目的 探讨实时三维超声成像(real-time three-dimensional echocardiography,RT3DE)及二维斑点追踪显像(two dimensional speckle tracking imaging,2DSTI)评价冠状动脉慢性完全闭塞(coronary artery chronic total occlusions,CA CTOs)患者经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)术前后的左心室功能变化情况.方法 选择