Koch三角(Koch’s triangle)是心脏内的一个重要解剖结构,1909年由Koch首次描述该区域而得名。Koch三角从提出至今已逾百年,其临床的重要性和意义经久不衰,近年来,随着消融治疗心律失常技术的迅速发展,使其临床重要意义有增无减。[解剖学组成]Koch三角由三尖瓣环、冠状窦开口及Todaro腱三部分组成(图1A、B)。其顶角朝向中央纤维体,Todaro腱即伸延入中央纤维体中。因房室 The Koch’s triangle is an important anatomy inside the heart, which was named after Koch first described the area in 1909. The clinical significance and significance of the Koch Triangle has been more than 100 years since it was proposed. In recent years, with the rapid development of ablation therapy for arrhythmia, its clinical significance has been increasing. [Anatomic composition] The Koch triangle consists of a tricuspid annulus, a coronary sinus opening, and a Todaro tendon (Figure 1A, B). With its apex facing the central fiber body, the Todaro tendon extends into the central fiber body. Due to atrioventricular