indexing啥意思，谢谢

Assessment of right-ventricle function through the tricuspid annular S'velocity, the ventricle diameters,and the pulmonary capillary wedge pressure is a strong predictor of outcomes when weaning from veno-arterial ECMO32,34]. In addition, measuring the right-ventricular and pulmonary circulation coupling by indexing the tricuspid annular S,TAPSE,and right-ventricle free wall longitudinal strain(RV FLS)to the right-ventricle systolic pressure(RVSP)has recently demonstrated more accuracy in predicting a successful VA-ECMO withdrawal compared to previously described parameters. Values higher than 0.3 of tricuspid annular S'/RVSP and 045 of both TAPSE/RVSP and RV FLS/RVSP were significant [35].

最近显示出与先前描述的参数相比，通过三尖瓣环S’速度、心室直径和肺毛细血管楔压来评估右心室功能，可以很好地预测静脉-动脉ECMO脱机的预后[32,34]。此外，通过将三尖瓣环S’、Tapse和右心室游离壁纵向应变(RV FLS)与右心室收缩压(RVSP)索引来测量右心室和肺动脉循环耦联，在预测成功的VA-ECMO撤机准确性更高。三尖瓣环S’/RVSP大于0.3、Tapse/RVSP和RV FLS/RVSP均大于0.45，在预测成功的VA-ECMO撤机时均有显著性意义[35]。

indexing啥意思，谢谢