目的：探讨经Marshall 静脉（VOM）化学消融治疗持续性房颤的解剖学基础。方法： 选取10%甲醛固定成 人心标本，剖查VOM，利用游标卡尺测量其长度、末端外径、开口距冠状窦口的长度以及汇入冠状窦处外径及 与冠状窦的夹角；测量冠状窦长度及其窦口纵、横径。结果：VOM 长度（32.53±11.72）mm，末端外径（1.82±0.50） mm，可通过5F JR4 导引管的比例为60.71% ；VOM 开口距离冠状窦口的长度（36.21±11.57）mm ；VOM 汇入冠 状窦处外径（7.42±2.09）mm ；VOM 与冠状窦所成夹角（43.98±15.75）° ；冠状窦长度（61.84±15.37） mm， 窦口纵径（12.61±3.15）mm、横径（8.07±2.25）mm。冠状窦口的纵径分别与其横径、冠状窦VOM 汇入处的 外径比较，差异具有统计学意义。冠状窦、VOM 开口距离冠状窦口的长度比较，差异具有统计学意义。其余各 项目在不同性别之间相互比较差异均无统计学意义。结论：从大体解剖水平测量VOM 的长度、外径，为更好开 展VOM 化学消融术治疗持续性房颤提供形态学参考。

Objective ： To explore the anatomical basis of vein of Marshall （VOM） chemical ablation for the treatment of persistent atrial fibrillation. Methods ： Thirty-four 10% formalin-fixed adult heart specimens were selected and the VOM was dissected and statistically analyzed. Using a vernier caliper， the VOM length， the outer diameter of its end， the distance from the VOM opening to the orifice of coronary sinus， and the outer diameter of the coronary sinus and the outer diameter of the coronary sinus at the point where the VOM converges were measured. The length of the coronary sinus and its longitudinal and transverse diameters， as well as the angle between the VOM and the coronary sinus， were measured. Results ： The VOM length was（ 32.53±11.72） mm. The outer diameter of the end of VOM was（ 1.82±0.50） mm， and the proportion of cases that could be accessed using a 5F JR4 guiding catheter was 60.71%. The distance from the VOM opening to the orifice of the coronary sinus was（ 36.21±11.57） mm. The outer diameter at the point where the VOM converges with the coronary sinus was（ 7.42±2.09） mm. The angle between the VOM and the coronary sinus was (43.98±15.75)°. The length of the coronary sinus was（ 61.84±15.37） mm， with a longitudinal diameter of the sinus orifice being（ 12.61± 3.15） mm， and a transverse diameter of（ 8.07±2.25） mm. The differences between the longitudinal diameter and the transverse diameter of the coronary sinus orifice， as well as the outer diameter at the point where the VOM converges with the coronary sinus， were statistically significant. The differences between the lengths of the coronary sinus and the distance from the VOM opening to the coronary sinus orifice were also statistically significant. The other items showed no statistically significant differences in comparison between genders. Conclusion ： This study measured the length and outer diameter of VOM at a gross anatomical level，providing morphological references for the application of VOM chemical ablation therapy in treating persistent atrial fib rillation.