Circulation:肾移植后选择性结扎动静脉瘘对心脏功能的影响

2019-07-07 MedSci MedSci原创

肾移植患者的心血管发病率和死亡率仍然居高不下。移植后动静脉瘘(AVF)的持续存在或可导致进行性适应不良的心血管重构。结扎AVF逆转这种不适应重构的能力尚不清楚。现研究人员开展一随机对照试验来评估AVF结扎对稳定肾移植受者心脏结构和功能的影响。本研究招募移植后12月移植肾功能仍稳定的肾移植患者,将其随机分至AVF结扎组或不干预组。所有患者在起始和6个月时进行心脏MRI。主要结点是左心室(LV)重量的

肾移植患者的心血管发病率和死亡率仍然居高不下。移植后动静脉瘘(AVF)的持续存在或可导致进行性适应不良的心血管重构。结扎AVF逆转这种不适应重构的能力尚不清楚。现研究人员开展一随机对照试验来评估AVF结扎对稳定肾移植受者心脏结构和功能的影响。

本研究招募移植后12月移植肾功能仍稳定的肾移植患者,将其随机分至AVF结扎组或不干预组。所有患者在起始和6个月时进行心脏MRI。主要结点是左心室(LV)重量的变化。次要结点包括LV容积、左右动脉面积、LV射血分数、NT-proBNP水平、NT-proBNP、心输出量/指数、臂血流和肺动脉流速的改变。

共筛选了93位患者,其中64位符合要求,被随机分至AVF结扎组(33位)或对照组(31位)。54位患者完成本研究(两组各27位)。第二次心脏MRI检查时,AVF结扎组LV重量平均减少22.1g(95%CI 15.0-29.1),而对照组稍增多了1.2g(95% CI -4.8~7.2,p<0.001)。AVF组左室舒张末期体积、左室收缩末期体积、心输出量、心指数、心房体积和NT-proBNP均明显下降(P<0.01)。左室射血分数(P=0.93)、肺动脉流速(P=0.07)无明显变化。AVF结扎术后无明显并发症。未见肾小球滤过率、收缩压和舒张压变化。

对于肾移植功能稳定的成年人,选择性结扎未闭AVF可显著降低左室心肌质量。

原始出处:

Nitesh N. Rao ,et al. Effects of Arteriovenous Fistula Ligation on Cardiac Structure and Function in Kidney Transplant Recipients. https://doi.org/10.1161/CIRCULATIONAHA.118.038505Circulation. 2019;139:2809–2818

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