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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.

Inflammatory Bowel Disease I: Ulcerative Colitis

Inflammatory Bowel Disease I: Ulcerative Colitis

Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...

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...

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...

Transient Ischemic Attack l: Introduction

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...

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Related Experiment Video

Updated: Apr 24, 2026

Multimodality Diagnosis of Mesenteric Ischemia

Multimodality Diagnosis of Mesenteric Ischemia

Published on: July 21, 2023

Gastrointestinal complications after ischemic stroke.

Carlos R Camara-Lemarroy¹, Beatriz E Ibarra-Yruegas², Fernando Gongora-Rivera¹

¹Departamento de Neurología, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Madero y Gonzalitos S/N, Monterrey, NL 64460, Mexico.

Journal of the Neurological Sciences

|September 13, 2014

Summary

Ischemic stroke frequently causes serious non-neurological issues, particularly gastrointestinal problems like dysphagia and bleeding. Understanding and managing these complications is crucial for improving patient outcomes and reducing mortality.

Keywords:

Constipation Dysphagia Fecal incontinence Gastrointestinal bleeding Gastrointestinal complications Motility Stroke

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Area of Science:

Neurology
Gastroenterology

Background:

Ischemic stroke is a leading cause of death, disability, and morbidity globally.
Stroke patients commonly experience non-neurological complications, including gastrointestinal issues.

Purpose of the Study:

To review the epidemiology, pathophysiology, diagnosis, management, and prevention of gastrointestinal complications following ischemic stroke.

Main Methods:

Literature review of studies on gastrointestinal complications in ischemic stroke patients.

Main Results:

Over 50% of stroke patients suffer from gastrointestinal complications such as dysphagia, constipation, fecal incontinence, or bleeding.
These complications correlate with extended hospital stays, increased secondary complications, and higher mortality rates.

Conclusions:

Gastrointestinal complications are prevalent and serious after ischemic stroke.
Effective management and prevention strategies are essential for improving patient prognosis and reducing healthcare burden.