Cardiac catheterization, standard lung function testing before and after iloprost inhalation, 6-min walk test, World Health Organization functional class, and hemodynamic parameters were monitored.
研究监测了吸入前后的心导管检查、标准肺功能检查，6分钟步行实验、世界卫生组织功能分级和血流动力学指标。
Conclusion: Both metoprolol and enalapril could improve cardiac function, but only metoprolol could reduce the incidence of high class VA in patients with severe congestive heart failure.
结论：美托洛尔与依那普利均可改善严重充血性心力衰竭患者心脏功能，而美托洛尔还同时具有干预高级别室性心律失常发生的特殊效应。
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