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Related Concept Videos

Arteries of the Head and Neck01:26

Arteries of the Head and Neck

The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...
Transient Ischemic Attack l: Introduction01:26

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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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.
The Arch of Aorta01:10

The Arch of Aorta

The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
Encircling the heart, the coronary arteries form a ring-like structure before...
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Atherosclerosis II: Clinical Manifestations and Diagnostic Tests

Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
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Disorders of the Autonomic Nervous System

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Related Experiment Video

Updated: Jun 20, 2026

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
09:36

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis

Published on: August 12, 2025

Syncope and carotid artery stenosis.

S M Cordina1, A I Qureshi

  • 1Zeenat Qureshi Stroke Research Center, University of Minnesota, Minneapolis, MN, USA. scordina@umn.edu

Minerva Medica
|September 15, 2009
PubMed
Summary

The carotid sinus regulates blood pressure, but its baroreceptor function can be impaired by disease or procedures. Carotid sinus hypersensitivity can cause syncope due to reduced blood flow to the brain.

Area of Science:

  • Cardiovascular physiology
  • Neurology

Background:

  • The carotid sinus is crucial for regulating systemic blood pressure via the baroreceptor mechanism.
  • This mechanism is susceptible to disruption by various pathological conditions and medical interventions.

Purpose of the Study:

  • To explore the relationship between carotid sinus pathology, carotid artery stenosis, and syncope.
  • To describe the clinical consequences of carotid stenosis and hypersensitivity leading to cerebral hypoperfusion.
  • To provide recommendations for screening patients at risk.

Main Methods:

  • Literature review and synthesis of existing studies on carotid sinus function, stenosis, and syncope.
  • Analysis of clinical presentations and etiological factors of syncope related to the carotid sinus.

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Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability
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Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability

Published on: February 23, 2016

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Last Updated: Jun 20, 2026

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
09:36

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis

Published on: August 12, 2025

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability
09:11

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability

Published on: February 23, 2016

  • Formulation of evidence-based screening recommendations.

    • Main Results:

    • Carotid artery stenosis is rarely a direct cause of syncope.
    • Syncope is more commonly associated with carotid sinus pathology and iatrogenic causes during procedures.
    • Carotid stenosis and hypersensitivity can lead to cerebral hypoperfusion and syncope.

    Conclusions:

    • Carotid sinus hypersensitivity and related conditions are significant causes of syncope.
    • Screening strategies are recommended for patients with suspected carotid sinus-related syncope.
    • Understanding these mechanisms is vital for accurate diagnosis and management.