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Related Concept Videos

Hypertension I: Introduction01:28

Hypertension I: Introduction

Hypertension is a widespread, long-term medical condition where blood pressure in the arteries remains elevated. It is characterized by systolic blood pressure readings of 130 mm Hg or above or diastolic blood pressure (DBP) readings of 80 mm Hg or higher. Unmanaged hypertension poses significant health risks, making the distinction between primary (or essential) hypertension and secondary hypertension crucial, as their management and implications vary.Primary HypertensionPrimary hypertension,...
Alterations in Blood Pressure01:30

Alterations in Blood Pressure

Alterations in blood pressure, such as hypertension (high blood pressure) and hypotension (low blood pressure), significantly affect human health. Understanding these conditions' classifications, causes, and symptoms is essential for effective management and treatment.
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart beats)...
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...
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,...
Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

Hypertension III: Clinical Manifestations and Diagnostic Studies

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...
Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...

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Related Experiment Video

Updated: Jun 3, 2026

Assessing Murine Resistance Artery Function Using Pressure Myography
07:25

Assessing Murine Resistance Artery Function Using Pressure Myography

Published on: June 7, 2013

Monogenic forms of hypertension.

Giacomo Domenico Simonetti1, Markus G Mohaupt, Mario G Bianchetti

  • 1Division of Pediatric Nephrology, Children's Hospital, University of Bern, 3010 Berne, Switzerland. giacomo.simonetti@insel.ch

European Journal of Pediatrics
|March 16, 2011
PubMed
Summary

Childhood hypertension can stem from single gene mutations, affecting potassium levels and renin secretion. Early diagnosis through hormonal and genetic testing is crucial for identifying these hereditary conditions.

Related Experiment Videos

Last Updated: Jun 3, 2026

Assessing Murine Resistance Artery Function Using Pressure Myography
07:25

Assessing Murine Resistance Artery Function Using Pressure Myography

Published on: June 7, 2013

Area of Science:

  • Pediatric Nephrology
  • Clinical Genetics
  • Endocrinology

Background:

  • Childhood arterial hypertension is less common than in adults but often secondary to underlying conditions.
  • Some pediatric hypertension cases remain unexplained after excluding common causes, suggesting genetic origins.
  • Single gene mutations can cause familial hypertension, inherited in autosomal dominant or recessive patterns.

Purpose of the Study:

  • To highlight the role of monogenic disorders in pediatric secondary hypertension.
  • To outline the distinct mechanisms of inherited hypertension.
  • To emphasize the importance of hormonal and genetic testing for diagnosis.

Main Methods:

  • Review of monogenic hypertensive disorders and their pathogenic mechanisms.
  • Correlation of electrolyte abnormalities (potassium, acid-base balance) and renin levels with specific genetic mutations.
  • Discussion of diagnostic approaches including hormonal assays and genetic testing.

Main Results:

  • Three primary mechanisms of monogenic hypertension identified: hyperactivity of renal sodium/chloride reabsorption, enzyme deficiencies in adrenal steroidogenesis, and excessive aldosterone synthesis.
  • Specific examples provided: Liddle's syndrome, Gordon's syndrome, congenital adrenal hyperplasia, apparent mineralocorticoid excess (AME), and glucocorticoid remediable aldosteronism.
  • Abnormal potassium levels and suppressed renin secretion suggest familial hypertension, but mild cases may lack these markers.

Conclusions:

  • Monogenic disorders are an important, often overlooked, cause of secondary hypertension in children.
  • Understanding the distinct molecular mechanisms aids in diagnosis and management.
  • Integrated hormonal and genetic evaluation is essential for early and accurate diagnosis of hereditary hypertensive disorders.