结论：右心导管术对静脉内皮有机械损伤。
Conclusion: Right heart catheterization may injure venous endothelium.
肺动脉压力经典的测量方法是通过右心导管检查术，肺动脉高压其诊断的金标准也是有创性右心导管检查法。
The classic measurement of the pressure of pulmonary artery is by cardiac catheter of right heart, and the gold standard of PAH is also this method.
方法：应用超声心动图对46例经心导管ASD封堵术患者的术前及术后右心负荷变化情况进行检测。
METHODS: Changes in right heart load in 46 patients with trans-catheter ASD occlusion were detected by echocardio gr aghy before and after the occlusion.
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