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Related Concept Videos

Introduction to Urinary System01:13

Introduction to Urinary System

The urinary system consists of two kidneys, two ureters, the urinary bladder, and the urethra.
The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...
Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

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...
Hormonal Regulation01:33

Hormonal Regulation

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.
Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

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,...
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

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...
Kidney Structure01:45

Kidney Structure

The kidneys are two large bean-shaped organs located in the upper abdomen. They filter the blood several times a day to remove toxins and rebalance water and electrolytes of the circulatory system via the renal veins. The kidneys receive blood directly from the heart via the renal arteries. These arteries enter the kidney at the hilum, the concave surface of the bean, where they branch and divide into smaller vessels and capillaries.

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Related Experiment Video

Updated: Jul 2, 2026

A Modified Two Kidney One Clip Mouse Model of Renin Regulation in Renal Artery Stenosis
08:21

A Modified Two Kidney One Clip Mouse Model of Renin Regulation in Renal Artery Stenosis

Published on: October 26, 2020

[The kidneys and hypertension].

M Hausberg1, J Mann, K Kühn

  • 1Schwerpunkt Nephrologie/Rheumatologie und allgemeine Innere Medizin, Städtisches Klinikum Karlsruhe.

Deutsche Medizinische Wochenschrift (1946)
|September 5, 2008
PubMed
Summary
This summary is machine-generated.

Investigating renal causes of severe hypertension, including renal artery stenosis, is crucial. Treatments like ACE inhibitors and ARBs can manage sympathetic hyperactivity and slow chronic kidney disease progression.

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5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat
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5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat

Published on: July 3, 2013

Related Experiment Videos

Last Updated: Jul 2, 2026

A Modified Two Kidney One Clip Mouse Model of Renin Regulation in Renal Artery Stenosis
08:21

A Modified Two Kidney One Clip Mouse Model of Renin Regulation in Renal Artery Stenosis

Published on: October 26, 2020

5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat
08:50

5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat

Published on: July 3, 2013

Area of Science:

  • Nephrology
  • Cardiology
  • Hypertension Management

Context:

  • Severe hypertension necessitates investigation for renal causes, such as renal artery stenosis.
  • Sympathetic hyperactivity, linked to cardiovascular risk, is present in early renal disease.
  • Renal artery stenosis over 70% requires intervention, especially in fibromuscular dysplasia or resistant hypertension.

Purpose:

  • To outline diagnostic approaches for renal causes of severe hypertension.
  • To review the role of ACE inhibitors and ARBs in managing renal disease and sympathetic hyperactivity.
  • To discuss treatment strategies for renal artery stenosis.

Summary:

  • Diagnostic workup for severe hypertension includes 24-hour blood pressure monitoring, urinalysis, renal function tests, and renal duplex sonography.
  • ACE inhibitors or ARBs can decrease sympathetic hyperactivity and reduce cardiovascular events in renal failure patients.
  • Renal artery stenosis >70% warrants intervention, particularly for fibromuscular dysplasia or severe, resistant hypertension. Angioplasty aims to preserve renal function, though evidence is still developing.

Impact:

  • Early detection and management of renal artery stenosis can prevent severe hypertension complications.
  • Pharmacological interventions can mitigate cardiovascular risks associated with renal disease and sympathetic hyperactivity.
  • Establishing clear criteria for renal artery stenosis intervention is vital for optimizing patient outcomes and renal function preservation.