从心力衰竭患者的6分钟步行距离来估计心肺运动测试期间的最大工作率
Giancarlo Piaggi1, Mara Paneroni2, Roberto Maestri3
1Istituti Clinici Scientifici Maugeri IRCCS, Respiratory and Cardiac Rehabilitation of the Institute of Montescano, Pavia, Italy.
概括
使用6分钟步行测试的慢性心力衰竭患者最大工作率的预测模型显示精度不佳. 准确的运动处方需要心肺运动测试或症状限制的增量测试.
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
- 康复医学 康复医学 康复医学
背景情况:
- 运动对于慢性心力衰竭 (CHF) 管理至关重要.
- 运动强度通常基于心肺运动测试 (CPX) 或症状限制增量测试 (SLIT) 的最大工作速率 (MWR).
- 由于后勤和成本限制,CPX/SLIT可能无法在心脏康复机构提供.
研究的目的:
- 开发一个预测模型来估计在CHF患者的CPX (estMWR@CPX) 的MWR.
- 为了这个预测,利用人类计量,临床测量和6分钟步行测试 (6MWT).
- 评估开发的预测模型的准确性.
主要方法:
- 进行了一项多中心,横截面,回顾性研究.
- 600名心力衰竭患者 (NYHA I-III类) 接受了CPX和6MWT.
- 用多变量线性回归分析来定义estMWR@CPX的预测模型.
主要成果:
- 最好的预测模型包括6MWT,性别,年龄,体重,NYHA类,左心室喷射率 (LVEF),吸烟状态和COPD (调整R2=0.55).
- 除了LVEF,模型的准确性略低 (调整后的R2=0.54).
- 该模型的准确性有限,只有34%的病例在预测和实际MWR@CPX之间有<10%的差异,并倾向于高估/低估值.
结论:
- 为MWR@CPX开发的预测模型在CHF患者中显示出缺乏准确性.
- 准确的循环运动计运动训练要求通过CPX或SLIT直接评估MWR.
- 仅仅6MWT就不足以在这个人群中准确规定运动强度.
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