期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
基于人机工程学的山区公路平曲线设计指标安全评价研究 被引量:9
1
作者 潘晓东 詹嘉 杜志刚 《中南公路工程》 2007年第3期21-23,75,共4页
道路线形的安全评价是从设计阶段保证行车安全的关键,道路平曲线的弯曲程度直接影响着行车安全,单位交角曲线长L/I(曲线长/曲线交角)代表了道路平曲线的弯曲程度。通过大量的行车实验及驾驶员的心率、最高血压的变动与单位交角曲... 道路线形的安全评价是从设计阶段保证行车安全的关键,道路平曲线的弯曲程度直接影响着行车安全,单位交角曲线长L/I(曲线长/曲线交角)代表了道路平曲线的弯曲程度。通过大量的行车实验及驾驶员的心率、最高血压的变动与单位交角曲线长L/I的相关分析,结果表明单位交角曲线长L/I可作为道路平曲线设计要素的安全性评价指标。在线形复杂的山区公路,基于人机工程学与工程费用的考虑,行车安全需要的L/I取值应在0.5~1.0之间。 展开更多
关键词 驾驶员 心率血压变动 曲线评价指标 单位交角曲线长L/I
下载PDF
Assessment of Heart Rate Variability and Heart Rate Turbulence Parameters in the Patients with Arterial Hypertension of the II Degree
2
作者 Tetyana V. Aleynikova 《Journal of Pharmacy and Pharmacology》 2018年第10期935-939,共5页
Background: AH (Arterial hypertension) due to the extremely high incidence is the most important risk factor for development of myocardial infarctions, strokes and lethal outcomes. It is very important to identify... Background: AH (Arterial hypertension) due to the extremely high incidence is the most important risk factor for development of myocardial infarctions, strokes and lethal outcomes. It is very important to identify a group of patients with increased risk of adverse outcomes to modify treatment and prevention. Significant assistance in resolving this problem is to provide a method of HM (Holter monitoring) which allows estimating the HRV (heart rate variability) and HRT (heart rate turbulence) parameters that are independent risk predictors of sudden cardiac death. The aim of our study was to assess HRV and HRT parameters in patients with AH of the II degree. Materials and methods: We have studied parameters of HRV and HRT in 214 patients with AH of the II-nd degree aged 35 to 70 (57.7 ± 7.6) years: 121 women (56.5%) and 93 men (43.5%). All patients underwent electrocardiography and echocardiography. Statistical analysis of the results has been made using the analytical package Statistics 10.0. Results: The parameters of HRV and HRT in patients with AH of the II degree were studied. Statistically significant correlations of the HRV parameters with the age of patients, average HR, circadian index, and EF (ejection fraction) were revealed. Statistically significant correlations of the HRT parameters with the LVMI (left ventricular mass index), EF, HR average were received. High level of the statistical significance of the interrelation of HRT parameters (TO and TS) has been revealed. Conclusions: The received results can be used during the selection of the group of patients with AH having high risk for unfavorable outcomes. Taking into account the features of the HRV and turbulence parameters and factors associated with them this will enable the individualization of the assessment of the risk in AH as much as possible and prescription of adequate treatment for each patient. 展开更多
关键词 AH HM HRV HRT LVMI left ventricular ejection fraction.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部