Results 31 to 40 of about 1,004,275 (153)

不同年龄组急性冠脉综合征住院患者临床特征及冠脉造影特点分析

open access: yesZhongguo shiyan zhenduanxue, 2020
目的探讨不同年龄组急性冠脉综合征住院患者临床特征及冠脉造影特点。方法选取2017年1月至2019年1月期间在我院接受过冠脉造影诊治的873例急性冠脉综合征患者作为研究对象,根据不同年龄层次分为高龄组(≥80岁,n=252)、中老年组(45-79岁,n=291)、青年组(
黄修献   +6 more
doaj  

Ophthalmic artery Doppler as potential surrogate marker of angiogenic imbalance in near‐term pregnancy

open access: yesUltrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 211-219, August 2026.
ABSTRACT Objectives First, to evaluate whether the ratio of soluble fms‐like tyrosine kinase‐1 to placental growth factor (sFlt‐1/PlGF) is associated with hemodynamic changes in ophthalmic artery (OA) Doppler in near‐term pregnancy. Second, to assess the performance of OA Doppler to rule in and rule out angiogenic factor imbalance.
M. F. Tinajero   +7 more
wiley   +1 more source

脑钠肽对高龄呼吸困难患者鉴别诊断作用探讨

open access: yesZhongguo shiyan zhenduanxue, 2007
目的评价血浆脑钠肽(BNP)浓度测定在高龄呼吸困难患者中鉴别诊断的作用价值。方法对64例高龄呼吸困难患者根据病史、体征、相关检查确定高龄呼吸困难的主要原因。分为高龄心衰组(33例)和高龄非心源性呼吸困难组(31例),相应设60-79老年(一般老年)对照组。运用快速荧光免疫法测定各组患者血浆BNP浓度。结果高龄心衰组心脏扩大,房颤或房扑发生率及LVEF、BNP值显著高于高龄非心源性呼吸困难组(P0.05)。而高龄非心源性呼吸困难组BNP值显著高于一般老年非心源性呼吸困难组(32例 ...
顾裕, 王斌
doaj  

Hypertension at 5 months postpartum in women with gestational diabetes

open access: yesUltrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 202-210, August 2026.
ABSTRACT Objective Gestational diabetes mellitus (GDM) is associated with future maternal cardiovascular disease, independent of the development of Type‐2 diabetes mellitus. As a major cardiovascular risk factor, we examined the incidence and predictors of hypertension at 5 months postpartum in women with previous GDM.
C. Gómez Fernández   +7 more
wiley   +1 more source

Overlap of nonbreeding wandering albatrosses with fisheries and implications for colony‐specific population trajectories at South Georgia

open access: yesConservation Biology, Volume 40, Issue 4, August 2026.
Abstract Bycatch in fisheries is one of the most serious threats to pelagic seabirds, causing major population declines. Mitigation measures can reduce bycatch substantially, but many fisheries fail to apply best practices, and seabird mortality remains high.
V. Warwick‐Evans   +2 more
wiley   +1 more source

Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework

open access: yesConservation Biology, Volume 40, Issue 4, August 2026.
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift   +8 more
wiley   +1 more source

生物学衰老标志物与心脏瓣膜病有关联

open access: yes浙江大学学报. 医学版
目的分析生物学衰老标志物表型年龄和表型年龄加速与心脏瓣膜病的关联性。方法从英国生物库2006—2010年纳入的人群中筛选符合纳排标准的研究对象。计算表型年龄和表型年龄加速,运用Cox多因素分析探究表型年龄和表型年龄加速是否是心脏瓣膜病的独立危险因素,并采用剔除缺失值和亚组分析的方法进行敏感性分析。通过受试者操作特征(ROC)曲线比较表型年龄、表型年龄加速对心脏瓣膜病的预测准确性,并绘制基于逻辑回归的临床决策曲线。结果本研究共纳入411 687名参与者,其中患有心脏瓣膜病14 258例(中位随访时间12 ...
刘 湘婧   +5 more
doaj   +1 more source

How identity bias affects perceptions of conservation messages on social media

open access: yesConservation Biology, Volume 40, Issue 4, August 2026.
Abstract Public support is essential for conservation, as public opinion can influence decision‐making and policy. Therefore, understanding whether bias toward conservationists due to their identity (identity bias) affects their perceived credibility and support for their recommendations is important.
Lauren F. Rudd   +4 more
wiley   +1 more source

适龄人口与高等教育发展趋势 [PDF]

open access: yes, 2015
高等教育适龄人口是高等教育学与人口学交叉的研究领域中比较受关注的问题。21世纪初以来,我国高等教育适龄人口的变化,尤其是2008、2009年高等教育适龄人口达到峰值之后的持续下降,必然对我国的高等教育产生影响。在这种影响下,高等教育可能产生一些与之相关的发展趋势变化。通过梳理适龄人口变化,了解适龄人口对高等教育可能产生的影响 ...
魏晓艳
core  

自发性高血压大鼠TGFβ1/ Smad7通路与心室纤维化的关系

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2008
[目的]探讨自发性高血压大鼠心室纤维化过程中TGFβ1和其下游分子smad7蛋白的表达规律。[方法]雄性自发性高血压大鼠(SHR)14只随机分为2组,SHR 22周龄组和SHR 14周龄组,另14只WKY大鼠也分为WKY大鼠22周龄组和WKY大鼠14周龄组。在实验动物14周龄和22周龄时,分别测定血压、心室质量指数;以氯胺T法测定心肌羟脯氨酸的含量,免疫组化测定Ⅰ型和Ⅲ型胶原在心肌组织中的表达水平;RT-PCR和Western-blot测定心肌中TGFβ1和其下游分子smad7的表达。[结果 ...
高修仁   +5 more
doaj  

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