相关实验视频
Updated: Jul 16, 2025

05:41
Non-invasive Assessment of Microvascular and Endothelial Function
Published on: January 29, 2013
16.3K
血管和自主功能作为妊娠高血压进展的早期预测生物标志物
Claudio Joo Turoni1, Silvia Benvenuto2, Rodrigo O Marañón1
1Departamento Biomédico, Instituto de Fisiología, Facultad de Medicina - UNT; INSIBO -CONICET, Tucumán, Argentina.
European journal of obstetrics & gynecology and reproductive biology: X
|September 21, 2023
概括
孕期高血压 (GH) 之前是怀孕早期的内皮功能障碍和动脉硬度增加. 这些变化涉及心率变化 (HRV) 和氧化 (NOx) 水平降低.
科学领域:
- 心血管生理学心血管生理学
- 怀孕并发症 怀孕并发症
- 孕产妇和胎儿医学 孕产妇和胎儿医学
背景情况:
- 妊娠高血压 (GH) 是一个常见的妊娠并发症.
- 怀孕早期发生的内皮功能变化,动脉硬和心率变化 (HRV) 在患有GH的女性中尚未完全理解.
研究的目的:
- 为了评估怀孕第一季度HRV,内皮功能和动脉硬度的变化.
- 确定这些早期怀孕变化和随后的GH发展之间的关系.
主要方法:
- 摄影透视图被用来评估内皮功能和动脉硬度在怀孕的第一季度.
- 通过心电图测量了心率变化 (HRV),副交感 (PNS) 和交感 (SNS) 指数.
- 用格里斯反应测量尿中的化物分泌量 (NOx).
主要成果:
- 发育GH的妇女在头三个月内患有较高的缩血压 (SBP),内皮功能下降,动脉硬性增加.
- 在GH组中,HRV显示低频功率和SD2/SD1比率下降.
- 发育GH的女性尿中NOx水平显著降低,与SNS指数负相关.
结论:
- 怀孕早期的内皮功能障碍和动脉硬度增加,先于GH的发展.
- 同情性-副同情性神经系统 (SNS-PNS) 相互关系的变化,与减少PNS抑制,在怀孕早期观察到的妇女发展GH.
相关概念视频
Hypertension III: Clinical Manifestations and Diagnostic Studies
23
Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
23
Hypertension and Regulation of Blood Pressure
2.1K
Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
2.1K
Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
110
Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
110
Hypertension II: Pathophysiology
14
Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
14
Heart Failure II: Pathophysiology
14
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
14
Hormonal Regulation
33.2K
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
33.2K

