】

中华医学会.临床诊疗指南·心血管分册[M].北京:人民卫生出版社, 2009：124‐。Sastry BKS, Narasimhan C，Reddy NK，et al ． Clini cal efficacy of sildenafil in primary pulmonary hy pertension：a randomized，placebo‐controlled，double‐blind，crossover study ［ J ］ ． J Am Coll Cardiol，2004，43.Jackson G, Chambers J ． Sildenafil for primary pulmonary hypertension：short and long‐term symptomatic benefit ［ J ］ ． Int J Clin Pract，2002，56.