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Related Concept Videos

Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

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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,...
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Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

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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...
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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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Hypertension I: Introduction01:28

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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,...
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Heart Failure II: Pathophysiology01:29

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

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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...
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Related Experiment Video

Updated: Oct 4, 2025

Ultrasound Assessment of Endothelial Function: A Technical Guideline of the Flow-mediated Dilation Test
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Endothelial Dysfunction in Hypertension: Current Concepts and Clinical Implications.

Giovanna Gallo1, Massimo Volpe1, Carmine Savoia1

  • 1Clinical and Molecular Medicine Department, Cardiology Unit, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy.

Frontiers in Medicine
|February 7, 2022
PubMed
Summary

Endothelial dysfunction contributes to cardiovascular disease and hypertension. Extracellular vesicles show promise as a therapeutic strategy to improve vascular function and counteract hypertension-related organ damage.

Keywords:
angiotensin IIendotheliuminflammationreactive oxygen species (ROS)vascular function

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Area of Science:

  • Cardiovascular Biology
  • Endothelial Function
  • Hypertension Pathophysiology

Background:

  • The endothelium regulates vascular tone via nitric oxide and prostaglandins.
  • Endothelial dysfunction involves vasoconstriction, inflammation, and prothrombic states.
  • Hypertension exacerbates endothelial dysfunction, increasing cardiovascular risk.

Purpose of the Study:

  • To review the pathophysiological role of endothelial dysfunction in cardiovascular diseases, particularly hypertension.
  • To explore innovative therapeutic strategies targeting the endothelium for vascular protection.

Main Methods:

  • Literature review of endothelial dysfunction mechanisms in hypertension.
  • Analysis of extracellular vesicles and macrovesicles as therapeutic agents.
  • Examination of therapeutic targets like the renin-angiotensin system.

Main Results:

  • Endothelial dysfunction is linked to vascular inflammation, remodeling, and atherosclerosis in hypertension.
  • Extracellular vesicles regulate endothelial function and may counteract hypertension-induced organ damage.
  • Macrovesicles offer potential for delivering therapeutic molecules for vascular protection.

Conclusions:

  • Endothelial dysfunction is a key factor in hypertension and its cardiovascular sequelae.
  • Extracellular vesicles represent a promising therapeutic avenue for managing hypertension and protecting vascular health.
  • Targeting the endothelium with novel strategies can improve vascular function and remodeling.