按人体成分量化的峰值氧气消耗与血液循环不稳定的患者的死亡率和发病率有关
Curtis A Wadey1,2, Alan R Barker1, A Graham Stuart3
1Children's Health & Exercise Research Centre (CHERC) Public Health and Sports Sciences, Faculty of Health and Life Sciences, University of Exeter Exeter United Kingdom.
按无脂肪质量量,而不是身体质量量量化的峰值氧气消耗,预测了Fontan失败. 这一发现改善了对Fontan循环患者的风险评估,表明每增加一个单位的风险降低了10%.
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
- 临床医学 临床医学
背景情况:
- 峰值氧气消耗 (峰值O2) 是心血管健康的一个关键指标.
- 传统上是按人体质量进行缩放的,它更准确地用无脂肪质量来表示.
- 在Fontan循环中,无脂肪质量缩放的峰值O2的预后值尚未得到充分确立.
研究的目的:
- 调查峰值O2和Fontan循环患者的死亡/发病率的不同缩放方法之间的关联.
- 要确定高峰值O2是否正常化为无脂肪质量是不良结果的更好的预测因素,而不是当扩大到总体质量时.
主要方法:
- 87名Fontan循环患者接受了心肺运动测试和双能X射线吸收计.
- 考克斯比例危险回归模型被用来评估峰值O2表达式和Fontan失败 (FF) 之间的关联.
- 随访时间的中位数为6.5年.
主要成果:
- 患有FF的个体的绝对峰值O2明显较低.
- 按体重量量化的峰值O2与FF没有显著相关 (HR,0.91;P=0.111).
- 通过无脂肪质量 (HR,0.90;P=0.020) 和瘦质量 (HR,0.90;P=0.017) 进行缩放的峰值O2与FF显著和反向相关,即使经过调整.
结论:
- 将O2峰值调整为无脂肪质量等身体组成指标,可以改善其与Fontan失败的关联.
- 一个1单位的峰值增加O2缩放到无脂肪质量或瘦肉质量与10%降低了Fontan失败的风险相关.
- 这突显了身体组成调整的O2峰值在Fontan患者风险分层的临床实用性.
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