Results There was no significant difference in plasma ANP level, pulmonary artery mean pressure(PAMP) and blood gas parameters between the aged and non-aged patients with COPD.
结果老年与非老年患者血浆心钠素浓度、肺动脉平均压及血气参数差异无显著性。
Whereas mean pulmonary artery pressure (MPAP) and pulmonary vascular resistance (PVR) were significantly higher compared with the control group.
平均肺动脉压（MPAP）、肺血管阻力（PVR）均高于对照组；
Whereas mean pulmonary artery pressure (MPAP) and pulmonary vascular resistance (PVR) were significantly higher compared with the control group.
平均肺动脉压（MPAP）、肺血管阻力（PVR）均高于对照组；
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