The response of breathing 40% oxygen was studied in 32 temporary residents diagnosed right ventricular hypertrophy ( RVH ) or doubtful ( RVH) by VCG at an altitude of 4,500m.

• 作者在海拨4500米高度观察32例经心电向量图诊断为右心室肥厚或可疑右室厚者对吸氧试验的反应,检查了他们在吸氧(40%25)前后心电向量图、心脏听诊、间接测算肺动脉收缩压和肺血流图的变化。