本文报道了应用超声心动图面积－长度法评价１５例闭塞性肺血管病右心功能及吸入一氧化氮（ＮＯ）后右心功能的变化。结果表明右室舒张末期容积（ＲＶＥＤＶ）和收缩末期容积（ＲＶＥＳＶ）增加，右室每搏量（ＲＶＳＶ）、右室射血分数（ＲＶＥＦ）和右心排血量（ＲＶＣＯ）均降低。吸入ＮＯ后收缩期跨三尖瓣峰值压差平均降低２３％（Ｐ＜０．００１），ＲＶＥＤＶ和ＲＶＥＳＶ分别减小１７．７％和３７．４（Ｐ值均小于０．００１），ＲＶＳＶ、ＲＶＥＦ、ＲＶＣＯ分别增加３０．８％、５８．７％、３４．４％（Ｐ值均小于０．０１－０．００１），提示右心功能有明显改善。 This article reports the application of echocardiography area-length method to evaluate the changes of right ventricular function and right ventricular function in 15 patients with obliterative pulmonary vascular disease after inhaled nitric oxide (NO). The results showed that RVEDV and RVESV increased, RVSV, RVEF and RVCO decreased. Systolic t-epicardial peak pressure drop was reduced by 23% (P <0.001), RVEDV and RVESV were decreased by 17.7% and 37.4 (P <0.001), respectively. RVSV, RVEF and RVCO increased by 30.8%, 58.7% and 34.4% respectively (P values ​​less than 0.01-0.001), suggesting a significant improvement of right heart function.