Related Experiment Video

Updated: Dec 6, 2025

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
28:13

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

Published on: February 26, 2013

33.7K

Cerebrovascular Dysfunction in Atrial Fibrillation

Rehan T Junejo1, Gregory Y H Lip1, James P Fisher2

  • 1Liverpool Centre for Cardiovascular Science, Liverpool Heart and Chest Hospital, University of Liverpool, Liverpool, United Kingdom.

Frontiers in Physiology
|October 5, 2020
PubMed

Insights

Atrial fibrillation (AF) patients exhibit impaired cerebrovascular function, including reduced cerebral blood flow and impaired autoregulation. These dysfunctions may explain the increased risk of cognitive decline and stroke in individuals with AF.

Area of Science:

  • Neurology
  • Cardiology
  • Vascular Biology

Background:

  • Atrial fibrillation (AF) is the most common sustained arrhythmia and a significant healthcare burden.
  • AF patients face increased risks of stroke, cognitive decline, depression, and dementia, with complex underlying causes.
  • Cerebrovascular dysfunction is a potential mechanism contributing to these adverse outcomes in AF.

Purpose of the Study:

  • To review evidence of cerebrovascular dysfunction in atrial fibrillation patients.
  • To explore potential physiological mechanisms linking AF to cognitive decline and cerebrovascular events.

Main Methods:

  • Review of existing literature on cerebrovascular function in AF patients compared to controls in sinus rhythm.
  • Analysis of data on cerebral blood flow, cerebrovascular carbon dioxide reactivity, cerebral autoregulation, and neurovascular coupling.

Main Results:

  • Evidence suggests diminished cerebral blood flow in AF patients.
  • Cerebrovascular carbon dioxide reactivity (vasodilatory reserve) is reduced in AF.
  • Impaired cerebral autoregulation and neurovascular coupling are observed in AF patients.

Conclusions:

  • Cerebrovascular dysfunction, including reduced blood flow and impaired regulation, is evident in atrial fibrillation.
  • These physiological abnormalities may contribute to the heightened risk of cognitive decline and cerebrovascular events in AF.
  • Further research is necessary to elucidate the precise mechanisms and clinical significance of these findings in AF management.

Keywords:
atrial fibrillationcarbon dioxidecerebral autoregulationcerebral blood flowhypertensionneurovascular coupling

More Related Videos

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation08:10

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

Published on: July 20, 2022

2.0K
The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation23:33

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation

Published on: February 28, 2012

84.2K

Related Concept Videos

Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
2.2K
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...
2.6K
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
286
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
1.3K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
301
Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
152