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Related Concept Videos

Hypertension and Regulation of Blood Pressure01:18

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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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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 II: Pathophysiology01:29

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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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Glaucoma: Overview01:25

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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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.
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A Laser-induced Mouse Model of Chronic Ocular Hypertension to Characterize Visual Defects
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[Hypertension and the eye].

Aude Ambresin, François Xavier Borruat

    Revue Medicale Suisse
    |February 9, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Systemic hypertension, or high blood pressure, commonly affects the population and can lead to serious eye conditions like hypertensive retinopathy. Regular screening is advised for individuals with severe hypertension or diabetes to prevent vision loss.

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    Area of Science:

    • Ophthalmology
    • Cardiology
    • Public Health

    Context:

    • Systemic hypertension is a prevalent global health issue.
    • It is a significant risk factor for cardiovascular diseases.
    • Hypertensive retinopathy is the most frequent ocular manifestation of high blood pressure.

    Purpose:

    • To outline the ocular complications associated with systemic hypertension.
    • To detail the initial and severe manifestations of hypertensive retinopathy.
    • To emphasize the importance of screening for at-risk populations.

    Summary:

    • Hypertensive retinopathy involves retinal arteriolar vasoconstriction, hemorrhages, cotton wool spots, and hard exudates due to retinal ischemia.
    • Ocular complications include subconjunctival hemorrhages, retinal vein occlusions, ischemic optic neuropathy, and retinal arterial occlusions.
    • It can exacerbate diabetic retinopathy and requires vigilant monitoring.

    Impact:

    • Highlights the link between systemic hypertension and visual impairment.
    • Underscores the necessity of ophthalmic evaluations in managing hypertension.
    • Promotes early detection and intervention to prevent vision loss and cardiovascular events.