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Blood Flow01:29

Blood Flow

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Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
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The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Aortic Regurgitation III: Medical Management01:25

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Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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Angina II: Classification01:27

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Angina, also known as angina pectoris, is a chest pain resulting from diminished blood flow to the heart muscle and is often a symptom of coronary artery disease. Angina presents several variants with distinctive attributes, etiologies, and therapeutic approaches. The main types of angina include stable, unstable, variant (Prinzmetal's), microvascular, intractable, and silent ischemia.Stable angina is caused by atherosclerosis, which leads to the formation of plaques that narrow the coronary...
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Peripheral Artery Disease I: Introduction01:30

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Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...
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相关实验视频

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The bm12 Inducible Model of Systemic Lupus Erythematosus SLE in C57BL/6 Mice
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狼血管炎是一种性血管炎.

Nauman Ismat Butt1, Fahmina Ashfaq1, Khalid Mahmood1

  • 1Department of Medicine & Allied, Azra Naheed Medical College, Superior University Lahore, Pakistan.

Journal of Ayub Medical College, Abbottabad : JAMC
|February 26, 2024
PubMed
概括
此摘要是机器生成的。

该案例研究强调了一名30岁的妇女被诊断患有狼血管炎,呈现全身症状,包括发烧,关节疼痛,口腔和呼吸系统问题. 早期诊断和使用类固醇和免疫抑制剂的治疗对于管理这种自身免疫性疾病至关重要.

关键词:
系统性红斑狼; ANA; 皮肤血管炎; 肺血管炎.

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科学领域:

  • 类风湿病学 类风湿病学
  • 皮肤病学 皮肤病学
  • 内部医学 内部医学

背景情况:

  • 系统性红斑狼 (SLE) 是一种慢性自身免疫性疾病,具有多样化的临床表现.
  • 狼血管炎是一种严重的并发症,涉及血管炎症,导致多器官损伤.
  • 早期识别和管理对于改善患者的治疗结果至关重要.

研究的目的:

  • 介绍一个年轻女子患有狼血管炎的临床病例.
  • 为了说明这种情况的诊断挑战和治疗方法.
  • 强调识别特征性症状和血清学标记的重要性.

主要方法:

  • 一个全面的临床评估,包括详细的病史和体检.
  • 诊断工作包括成像 (胸部X射线,HRCT) 和血清学测试 (ANA,Anti-Ro抗体,补充水平).
  • 治疗开始时使用皮质类固醇,mycophenolate mofetil和氧化.

主要成果:

  • 患者出现了一系列症状,包括发烧,关节痛,口腔,光敏感性,体重减轻,脱发以及呼吸不良的干咳.
  • 身体检查显示马拉色素过多,脱发,皮肤和肌炎.
  • 实验室研究结果显示,抗核抗体 (ANA) 和抗Ro抗体呈阳性,C3和C4补充水平降低.
  • 图像显示胸部HRCT上的双边地面玻璃不透明.

结论:

  • 这一案例强调了狼血管炎的复杂表现.
  • 基于临床,血清学和成像发现的及时诊断是必不可少的.
  • 积极的免疫抑制疗法适用于管理严重的症状,如狼血管炎.