【摘 要】
:
炎热的夏季,人体全身血管舒张、血流加快、阻力减少,血压会较冬春季节偏低。这是否意味着心脑血管疾病患者可以在炎夏高枕无忧了?实际情况却恰恰相反。三正医疗健康专家表示,
论文部分内容阅读
炎热的夏季,人体全身血管舒张、血流加快、阻力减少,血压会较冬春季节偏低。这是否意味着心脑血管疾病患者可以在炎夏高枕无忧了?实际情况却恰恰相反。三正医疗健康专家表示,数据统计表明,炎热的夏季是心脑血管疾病,特别是高血压、中风、脑供血不足、心梗发生的高峰期。这是为什么呢?对此,三正医疗健康专家介绍说,首先,夏季天气闷热容易导致心情烦躁、紧张焦虑,引发交感神经功能亢进,肾上腺素分泌增加,引发血管痉
The hot summer, the body’s systemic vasodilation, blood flow, reduce resistance, blood pressure will be lower than winter and spring. Does this mean that patients with cardiovascular and cerebrovascular diseases can sit back and relax in the summer? The actual situation is exactly the opposite. Three positive medical and health experts said the statistics show that the hot summer is a cardiovascular disease, especially high blood pressure, stroke, cerebral insufficiency, the peak of myocardial infarction. This is why? In this regard, three positive medical and health experts said, first of all, the hot weather in summer easily lead to irritability, nervousness, triggering hyperactivity of sympathetic, adrenaline secretion increased, trigger vasospasm
其他文献
从2007年到2009年,中国的外貌环境发生了巨大的变化,可以说全球这次爆发的经济危机给每一个国家都带来了巨大的影响。中国作为一个贸易大国,受到影响不可避免,这就需要积极应
Gallium-nitride (GaN)-based light emitting diodes have been wildly used.[1] However,external efficiency of GaN-based LEDs still needs to be improved in orde
张先(990—1078年),字子野,乌程(今浙江湖州吴兴)人,北宋时期著名的词人。其在《醉垂鞭》一词中写道:“双蝶绣罗裙,东池宴,初相见。朱粉不深匀,闲花淡淡春。细看诸处好,人人
In this paper,the light pollution of LED outdoor display is discussed.The main light pollution’s references limits,including light invasion,the glare,the L
In this work,the dislocation-related efficiency droop in InGaN/GaN blue light-emitting diodes (LEDs) was investigated by comparing the external quantum effi
In recent years,governments and some private sector users in countries such as China and others have begun to replace original street lighting,such as sodiu
Lux has been used as the photometric unit of Illuminance for decades,measuring luminous flux per unit area.As it is the measure of light intensity as percei
Indium Tin Oxide (ITO) films are widely used on LED chips nowadays for the applications on ohmic contacts and current diffusion layer of p-GaN.However,ITO f
美丽辽阔的新疆自古以来就是我国一个多民族聚居的地区,在历史上曾有西戎、乌揭(呼揭)、月支、塞种等许多少数民族部落在此生息繁衍,叱咤风云,并在吐鲁番盆地建立了姑师(车
环境保护与动物保护,在多数情况下是并行不悖的.但也有个别案例发生,因动物保护过头,使脆弱的环境受到破坏.这就好比,大熊猫赖以生存的箭竹假如不幸沦为极端濒危物种的话,那