患有抗性高血压和microalbuminuria的患者的全身微血管功能降低:一项观察性研究
Vinicius Crahim1, Valéria Verri1, Andrea De Lorenzo1
1National Institute of Cardiology, Rio de Janeiro, Brazil.
Journal of human hypertension
|September 17, 2024
概括
抗性高血压与微专尿与微血管功能受损有关. 激光光斑对比成像显示,这些患者的内皮和光滑肌反应性降低,这表明需要加强血压管理.
科学领域:
- 心血管医学 心血管医学
- 腎臟病學 (nephrology) 是一種醫學專業.
- 医疗成像医学成像
背景情况:
- 抗性高血压 (RH) 与微专尿 (MAU) 相关,这是心血管风险和位器官损伤的标志物.
- 微血管损伤可能是RH和MAU之间的联系的基础.
- 微血管内皮功能的非侵入性评估对于管理RH至关重要,有或没有MAU.
研究的目的:
- 用激光光斑对比成像 (LSCI) 来评估RH患者的系统微血管内皮功能,有或没有MAU,使用激光光斑对比成像 (LSCI).
- 为了比较正常白色素尿和MAU的RH患者之间的微血管反应性.
主要方法:
- 激光光斑对比成像 (LSCI) 用于测量皮肤微血管输液变化.
- 药理学 (乙胆,酸) 和生理学 (闭塞后反应性高血压) 刺激评估了血管扩张反应.
- 研究了32名患有RH和正常albuminuria的患者和32名患有RH和MAU的患者.
主要成果:
- 与没有MAU的患者相比,患有RH和MAU的患者在闭塞后反应性高血症期间表现出减少的内皮依赖的微血管反应性.
- 在RH和MAU患者中,通过酸的反应评估的内皮独立微血管反应性也减少了.
- 乙胆诱导的血管扩张在两组之间没有显著差异.
结论:
- 患有抗性高血压和小albuminuria的患者显示出内皮功能障碍和微血管光滑肌功能受损的证据.
- 这些发现表明,患有RH和MAU的个体可能会从更积极的血压控制策略中受益,以防止进一步的血管损伤.
- 在高血压患者中,LSCI提供了一种有价值的非侵入性工具,用于评估微血管功能.
相关概念视频
01:16Antihypertensive Drugs: Action of Diuretics
629
Diuretics are antihypertensive drugs used to treat hypertension resulting from sodium and water retention. Sodium, vital for fluid balance and nerve or muscle function, is regulated by the kidneys through millions of nephrons. Blood enters nephrons via afferent arterioles, which branch into capillaries called glomeruli. These filter blood plasma, allowing water and solutes, like sodium ions, to pass through capillary walls into Bowman's capsule. The filtrate then flows through various...
629
01:25Antihypertensive Drugs: Direct Renin Inhibitors
508
The renin-angiotensin-aldosterone system (RAAS) is an intricate physiological pathway involving numerous enzymes and hormones, including renin, angiotensin-converting enzyme (ACE), angiotensin I and II, and aldosterone. Imbalances within this system increase the production of angiotensin II and aldosterone. Increased angiotensin II levels promote vasoconstriction and blood pressure elevation. Concurrently, higher aldosterone levels stimulate sodium and water reabsorption in the kidneys,...
508
01:30Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
492
Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
492
01:26Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
396
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
396
01:20Renal Corpuscle
1.7K
The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
1.7K
01:30Antihypertensive Drugs: Angiotensin II Receptor Blockers
600
In the renin-angiotensin-aldosterone system, a hormone called angiotensin II plays a crucial role. It binds to the AT1 receptors in vascular smooth muscles coupled with Gq proteins. The activation of these receptors activates an enzyme called phospholipase C, which releases two molecules: inositol trisphosphate and diacylglycerol. These molecules cause a chain reaction that leads to the phosphorylation of myosin light chains and promotes interaction between actin and myosin, leading to smooth...
600