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Hemorrhagic Stroke ll: Pathophysiology

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...

Sexually Transmitted Infections

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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...

Ischemic Stroke ll: Pathophysiology

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...

Ischemic Stroke l: Introduction

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.

Hemorrhagic Stroke l: Introduction

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...

Ischemic Heart Disease: Overview

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Updated: May 12, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

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Published on: August 18, 2015

HIV stroke risk: evidence and implications.

Elyse J Singer¹, Miguel Valdes-Sueiras, Deborah L Commins

¹National Neurological AIDS Bank, Department of Neurology, David Geffen School of Medicine at UCLA, 11645 Wilshire Blvd, Suite 770, Los Angeles, CA 90025, USA.

Therapeutic Advances in Chronic Disease

|April 5, 2013

Summary

Human immunodeficiency virus type 1 (HIV-1) infection increases stroke risk, particularly ischemic stroke. Lifelong combined antiretroviral therapy (cART) and chronic inflammation contribute to this significant neurological complication in aging HIV+ individuals.

Keywords:

atherosclerosis cerebrovascular human immunodeficiency virus type 1 infection inflammation stroke

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A Rat Model of EcoHIV Brain Infection

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Published on: January 21, 2021

Area of Science:

Neurology
Infectious Diseases
Cardiovascular Science

Background:

An estimated 34 million people are infected with human immunodeficiency virus type 1 (HIV-1), the causative agent of acquired immunodeficiency syndrome (AIDS).
Current treatments cannot eradicate HIV-1, necessitating lifelong combined antiretroviral therapy (cART) for most HIV-positive (HIV+) individuals.
Stroke has been a recognized complication of HIV-1 infection since the epidemic's early stages.

Purpose of the Study:

To highlight ischemic stroke as a significant neurological complication in the aging HIV+ population.
To discuss the multifactorial causes of stroke in HIV-1 infection and its treatment.
To emphasize the need for novel prevention and treatment strategies for stroke in HIV+ individuals.

Main Methods:

Review of existing literature on stroke in HIV-1 infection.
Analysis of potential contributing factors including opportunistic infections, tumors, atherosclerosis, metabolic disorders, and direct viral effects.
Examination of the role of chronic inflammation and long-term cART exposure.

Main Results:

Ischemic stroke is a major neurological concern for aging individuals with chronic HIV-1 infection.
Stroke pathogenesis in HIV+ individuals is complex, involving traditional risk factors, opportunistic conditions, and direct viral impact.
Prolonged exposure to cART and chronic inflammation are identified as key contributors to increased stroke risk.

Conclusions:

The aging HIV+ population faces a heightened risk of ischemic stroke.
A comprehensive understanding of stroke causes in HIV-1 is crucial for effective management.
Development of tailored prevention and treatment strategies is urgently required to mitigate stroke incidence in HIV+ patients.