In the present issue of the European Respiratory Journal, Heerdt et al. [1] report on the validation of right ventricularejection fraction (RVEF) calculated from a pressure curve at cardiac catheterisation. This is of great interest as right ventricular (RV) function is the main determinant of symptomatology and outcome in pulmonary hypertension [2], and RVEF accordingly adds significantly to risk stratification in these patients [3]. However, ejection fraction (EF) is a ratio of stroke volume (SV) to end-diastolic volume (EDV), with no pressure in the equation. So, how is it possible to calculate a volume ratio from pressure measurements? Right ventricular ejection fraction can be calculated from a pressure curve http://bit.ly/2tjE37Q

中文翻译：

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当一切都归结为压力时：心导管术中的右心室射血分数

在本期欧洲呼吸杂志中，Heerdt 等人。[1] 关于根据心导管插入术时的压力曲线计算右心室射血分数 (RVEF) 的验证报告。这是非常有趣的，因为右心室 (RV) 功能是肺动脉高压症状和结果的主要决定因素 [2]，因此 RVEF 显着增加了这些患者的风险分层 [3]。然而，射血分数 (EF) 是每搏输出量 (SV) 与舒张末期容积 (EDV) 的比率，方程中没有压力。那么，如何从压力测量中计算出体积比呢？右心室射血分数可以从压力曲线计算 http://bit.ly/2tjE37Q