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Related Concept Videos

Alterations in Blood Pressure01:30

Alterations in Blood Pressure

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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.
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...
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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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Open Angle Glaucoma: Treatment01:27

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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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Blood Pressure Imbalances and Circulatory Shock01:24

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Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
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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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Hypertension I: Introduction

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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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Related Experiment Video

Updated: Mar 7, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
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[Idiopathic Intracranial Hypotension].

Iwao Takeshita1, Satoshi O Suzuki, Toru Iwaki

  • 1Aoi Clinic.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|February 17, 2017
PubMed
Summary

Idiopathic intracranial hypotension, caused by cerebrospinal fluid (CSF) leakage, presents as severe headache. Early diagnosis and treatment are crucial for good outcomes, preventing complications from delayed management.

Area of Science:

  • Neurology
  • Neurosurgery
  • Radiology

Background:

  • Idiopathic intracranial hypotension (IIH) is primarily caused by cerebrospinal fluid (CSF) leakage from a dural tear.
  • Headaches associated with IIH require differentiation from stroke to avoid diagnostic delays.

Observation:

  • Presents with severe headache, potentially accompanied by nausea or vomiting.
  • Neuro-imaging studies are essential for identifying the source of CSF leakage.
  • Immunohistological staining visualizes spinal CSF and pathways.

Findings:

  • Demonstrable cases highlight the utility of neuro-imaging in diagnosing IIH.
  • Spinal CSF outlets and pathways can be visualized through specific staining techniques.

Implications:

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  • Prompt diagnosis and appropriate therapy are key to achieving favorable patient outcomes.
  • Delayed management of IIH can lead to severe complications and irreversible neurological deficits.