长期以来无保护的左主干病变介入治疗被视为冠心病介入治疗的相对禁忌证。随着对左主干病变解剖生理特性研究的深入、介入治疗器械的发展(药物洗脱支架的出现、血管内超声等大量应用)及介入治疗技术的成熟,左主干病变介入治疗的成功率及中远期疗效得到极大的改善。近年来一些研 Long-term unprotected left main artery interventional treatment is considered a relative contraindication for coronary intervention. With the deepening of research on the anatomical and physiological characteristics of the left main lesion, the success rate of interventional treatment of left main trunk lesion and interventional therapy in the development of interventional therapy devices (such as the emergence of drug-eluting stents and the large number of intravascular ultrasound applications) and the maturation of interventional therapy Long-term efficacy has been greatly improved. In recent years some research