冠状动脉介入治疗已在临床广泛应用 ,导致治疗失败最常见的原因是由于病变血管极其狭窄、扭曲 ,导丝、球囊或支架不能通过狭窄病变处[1] 。选择合适的指引导管和导丝能提供良好的支撑力 ,能把手术失败减少到最低程度。Carlson等[2 ] 报道双导丝技术可以提供足够的硬度 ,使得球 Coronary intervention has been widely used clinically, resulting in the most common cause of treatment failure due to extremely narrow vascular lesions, distortions, and guide wires, balloons, or stents that fail to pass through stenotic lesions [1]. Choosing the right guide catheter and guidewire provides good support and minimizes the chance of failure. Carlson et al. [2] reported that double guidewire technology can provide enough hardness to make the ball