This study aimed to evaluate the guiding role of left adrenal vein (LAV) for right adrenal venous sampling (AVS). A total of 347 patients who were diagnosed with primary aldosteronism (PA) and underwent successful AVS procedures from January 2020 to July 2021 were retrospectively analyzed. According to the different quadrant position of the orifice of right adrenal vein (RAV), the area where the orifice of RAV is located is divided into three areas: A, B, and C and the area A is further subdivided into A1, A2, and A3 areas. By counting the area where the orifice of RAV is located, the guiding role of the LAV on the RAV is determined. Most of the orifice of RAV are located in area A, and the proportions of areas A, B, and C was 96.8%, 1.4%, and 1.7%, respectively. In area A, areas A1, A2, and A3 account for 80.9%, 17.0%, and 2.1%, respectively. High body mass index, female and smaller the angle between the LAV and horizontal line was associated with the closer positional relationship between the LAV on the RAV. These findings suggest that most of the horizontal position of the RAV orifice is close to the horizontal position of the most distal end of the LAV, which indicate that the LAV location can play an important role on the guiding for right AVS. Additionally, body mass index, sex, and the angle of the LAV was largely related to location of the orifice of the RAV.

中文翻译：

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左肾上腺静脉：右肾上腺静脉采样的重要方向

本研究旨在评估左肾上腺静脉（LAV）对右肾上腺静脉采样（AVS）的指导作用。回顾性分析了 2020 年 1 月至 2021 年 7 月期间诊断为原发性醛固酮增多症 (PA) 并成功接受 AVS 手术的 347 例患者。根据右肾上腺静脉口（RAV）在象限位置的不同，将RAV口所在区域分为A、B、C三个区域，其中A区域又细分为A1、A2、和A3区域。通过统计RAV孔口所在的面积，确定LAV对RAV的导向作用。RAV的孔口大部分位于A区，A区、B区和C区所占比例分别为96.8%、1.4%和1.7%。A区中，A1区、A2区、A3区分别占比80.9%、17.0%、2.1%。体重指数高、女性LAV与水平线夹角较小与LAV对RAV的位置关系越近相关。这些发现表明，RAV 孔口的水平位置大部分接近于 LAV 最远端的水平位置，这表明 LAV 位置对右侧 AVS 的引导具有重要作用。此外，体重指数、性别和 LAV 角度很大程度上与 RAV 孔口的位置相关。