肺高血圧患者において,6分間歩行距離の改善は臨床転帰の改善を反映しない。
Savarese G, et al: Do changes of 6-minute walk distance predict clinical events in patients with pulmonary arterial hypertension? A meta-analysis of 22 randomized trials. J Am Coll Cardiol. 2012; 60: 1192-201. PubMed