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Submaximal oxygen uptake kinetics, functional mobility, and physical activity in older adults with heart failure and reduced ejection fraction

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Journal of Geriatric Cardiology 2016年第5期13卷 450-457页

作者： Scott L Hummel John Herald Craig Alpert Kimberlee A Gretebeck Wendy S Champoux donald r dengel Peter V Vaitkevicius Neil B Alexander Department of lnternal Medicine University of Michigan Ann Arbor MI USA VA Ann Arbor Healthcare System Ann Arbor MI USA School of Nursing University of Wisconsin-Madison Madison WI USA William Beaumont School of Medicine Oakland University Royal Oak MI USA School of Kinesiology University of Minnesota Minneapolis MN USA Aspirus Health System Ontanagon ML USA

Background Submaximal oxygen uptake measures are more feasible and may better predict clinical cardiac outcomes than maximal tests in older adults with heart failure （HF）. We examined relationships between maximal oxygen uptake, submaximal oxygen kinetics, fianctional mobility, and physical activity in older adults with HF and reduced ejection fraction. Methods Older adults with HF and reduced ejection fraction （n = 25, age 75 ：i： 7 years） were compared to 25 healthy ageand gender-matched controls. Assessments included a maximal treadmill test for peak oxygen uptake （VO2p^ak）, oxygen uptake kinetics at onset of and on recovery from a submaximal treadmill test, functional mobility testing [Get Up and Go （GUG）, Comfortable Gait Speed （CGS）, Unipedal Stance （US）], and self-reported physical activity （PA）. results Compared to controls, HF had worse performance on GUG, CGS, and US, greater delays in submaximal oxygen uptake kinetics, and lower PA. In controls, VO2peak was more strongly associated with functional mobility and PA than submaximal oxygen uptake kinetics. In HF patients, submaximal oxygen uptake kinetics were similarly associated with GUG and CGS as VO2peak, but weakly associated with PA. Conclusions Based on their mobility performance, older HF patients with reduced ejection fraction are at risk for adverse functional outcomes. In this population, submaximal oxygen uptake measures may be equivalent to VO2 peak in predicting functional mobility, and in addition to being more feasible, may provide better insight into how aerobic function relates to mobility in older adults with HF.

关键词： Aging Congestive heart failure Mobility Oxygen uptake The elderly

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六个Hr的创新思维

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企业家信息 2016年第5期 87-89页

作者： dengel

随着西方人力资源管理理论、模型以及技术的引进和运用，中国企业人力资源管理越来越现代化．管理制度越来越健全。但这些并不能保证执行过程的顺利．总有各种各样的问题削弱了人力资源管理效能。

关键词：创新思维人力资源管理理论企业人力资源管理 Hr 管理制度管理效能执行过程现代化

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美国固体推进剂的检验与鉴定规程

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固体火箭技术 1985年第4期 11-17页

作者： O.H.dengel 姚润森

美国建立了测定固体推进剂的化学、物理和界面等各项性能的标准检验规程。对推进剂来说,所产生的整套数据,必须是充分的,而且足以确保其安全、工艺参数,并满足质量鉴定指标。固体推进剂的安全、化学、物理、力学等各项性能的检验,是与... 详细信息

美国建立了测定固体推进剂的化学、物理和界面等各项性能的标准检验规程。对推进剂来说,所产生的整套数据,必须是充分的,而且足以确保其安全、工艺参数,并满足质量鉴定指标。固体推进剂的安全、化学、物理、力学等各项性能的检验,是与特定的发动机指标相联系的。测试项目的选择取决于推进剂的类型(如单基或双基,复合或复合改性双基),发动机使用条件(如密闭或不密闭的发动机壳体、相对应的溫度及高度的点火条件),以及要求的贮存寿命。目前,美国对推进剂的检验和鉴定大约进行六十种测试。本文提出了检验与鉴定准则的概要,讨论了各项或各类测试的细节与目的。

关键词：固体推进剂物理爆轰测试项目美国美利坚合众国北美洲

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