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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,...
Hypertension V: Nursing Management01:23

Hypertension V: Nursing Management

The nursing management of hypertension involves accurately assessing symptoms, making a comprehensive nursing diagnosis, collaborating with patients to set goals, and implementing targeted interventions to mitigate the condition's impact and improve patient well-being.Comprehensive AssessmentThe initial step in nursing care for hypertension involves a thorough patient assessment. It includes evaluating symptoms such as headaches, dizziness, blurred vision, and previous hypertension episodes.
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 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...
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...

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Related Experiment Video

Updated: Jun 13, 2026

Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas
05:31

Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas

Published on: January 26, 2024

[Pregnancy hypertension].

Michel Beaufils1

  • 1Hôpital Tenon, 75020 Paris, France. michel.beaufils@gmail.com

Nephrologie & Therapeutique
|April 20, 2010
PubMed
Summary

Preeclampsia, a pregnancy hypertension disorder, stems from immune maladaptation and placental issues, leading to severe maternal and fetal risks. Early prevention shows promise, as current treatments don't improve outcomes.

Area of Science:

  • Obstetrics and Gynecology
  • Immunology
  • Vascular Biology

Context:

  • Hypertension affects 6-8% of pregnancies; preeclampsia occurs in 2%, with severe forms in 0.6%.
  • Preeclampsia is a significant cause of fetal and maternal mortality.
  • It presents as maternal or placental preeclampsia, with origins in immune maladaptation and placental defects.

Purpose:

  • To explore the pathophysiology of preeclampsia, differentiating maternal and placental forms.
  • To investigate the role of materno-fetal immune maladaptation, defective angiogenesis, and placental ischemia.
  • To review current understanding of clinical presentations, treatment limitations, and future research directions.

Summary:

  • Preeclampsia involves materno-fetal immune maladaptation (e.g., uterine NK cells and HLA-C) and defective angiogenesis.

Related Experiment Videos

Last Updated: Jun 13, 2026

Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas
05:31

Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas

Published on: January 26, 2024

  • Abnormal production of angiogenic factor receptors and TGF-beta contributes to placental ischemia.
  • Ischemia leads to trophoblastic debris shedding, inflammation, and endothelial dysfunction, causing maternal symptoms.

    • Impact:

    • Clinical outcomes range from mild hypertension to life-threatening preeclampsia with high maternal and fetal risks.
    • Antihypertensive drugs lower blood pressure but do not improve fetal or maternal prognosis.
    • Early preventive treatments are promising; research is active, and prior preeclampsia increases future risks for cardiovascular disease and diabetes.