目的：明确正常心包横窦的范围、通连及变异，为临床影像学及心脏外科疾病的诊断及治疗提供依据。方法：选用正常成人胸部连续断层标本４０例及心包完整的离体心脏１０例。对横窦的形态、通连关系、毗邻关系及变异进行观察。结果：５０例标本中，２例可见前垂直部与主动脉上窦后部直接延续，未见中间水平部；４８例可见中间水平部或／及后垂直部，其中２４％（１２例）中间水平部延续到右肺动脉前下方，３０％（１５例）延续到右肺动脉中点下方，１６％（８例）延续到右肺动脉后下方，２６％（１３例）可见后垂直部，其中１０例紧贴左房上部后方向下，３例向上贴于右肺动脉后下壁；７０％（３５例）可见主动脉上窦后部。结论：心包横窦的前垂直部及中央水平部前段解剖结构较固定，但横窦中央水平部中、后段变异较大，而主动脉上隐窝后部有３０％的人不发育。 OBJECTIVE: To determine the range, concomitant and variability of transverse sinus of normal pericardium and provide the basis for the diagnosis and treatment of clinical imaging and cardiac surgery diseases. Methods: Forty cases of normal adult chest CT and 10 cases of intact isolated heart were selected. The morphology of transverse sinus, continuity, adjacent relationship and variation were observed. Results: Of the 50 specimens, the anterior and posterior sinus of 2 cases were seen directly in the anterior and posterior segments of the aorta, and no middle horizontal part was seen in 2 cases. The middle horizontal part or / and the posterior vertical part were seen in 48 cases, of which 24% (12 cases) The level continued to the anterior and posterior of the right pulmonary artery, 30% (15 cases) continued to the right of the right pulmonary artery below the midpoint, 16% (8 cases) extended to the lower right pulmonary artery, 26% (13 cases) visible after the vertical, Close to the upper left of the left atrial posterior, 3 cases posted up the lower wall of the right pulmonary artery; 70% (35 cases) showed the posterior aortic sinus. CONCLUSION: The anatomic structure of the anterior segment of the transverse sinus of the pericardium and the anterior segment of the central horizontal segment is relatively fixed, but the variation of the anterior segment of the transverse segment of the transverse sinus is larger than that of the posterior segment of the transverse sinus. However, 30% of the posterior segment of the aorta does not develop.