Related Experiment Video
Updated: Aug 30, 2025
05:02
Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
Published on: August 30, 2019
7.3K
Vestibular syncope: clinical characteristics and mechanism
Hanim Kwon1, Eunjin Kwon2, Hyo-Jung Kim3
1Department of Neurology, Korea University Ansan Hospital, Ansan, South Korea.
Annals of Clinical and Translational Neurology
|September 3, 2022
Summary
Vestibular syncope, triggered by vertigo, causes hemodynamic changes leading to fainting. This study clarifies its mechanisms and links it to various vestibular disorders, emphasizing the need for evaluation to prevent injuries.
Area of Science:
- Neurology
- Cardiology
- Ophthalmology
Background:
- Vestibular syncope is a newly recognized condition where vertigo-induced hemodynamic changes cause syncope.
- Understanding its underlying mechanisms is crucial for diagnosis and management.
Purpose of the Study:
- To investigate the clinical and laboratory findings of vestibular syncope.
- To refine the understanding of the mechanism underlying vestibular syncope.
Main Methods:
- Retrospective analysis of 53 patients diagnosed with vestibular syncope between 2017 and 2021.
- Incorporation of a velocity-storage model into dual reflex pathways (vestibulo-sympathetic reflex and baroreflex) to predict cardiovascular responses.
Main Results:
- 37.7% of patients experienced multiple episodes, and 13.2% sustained injuries.
- Common underlying disorders included Meniere's disease (20.8%) and benign paroxysmal positional vertigo (9.4%).
- Abnormal vestibular tests (e.g., c-VEMP, HIT) and comorbidities like dyslipidemia and hypertension were frequent.
Conclusions:
- Vestibular syncope is a neurally mediated reflex syncope linked to hemodynamic changes during vertigo.
- It is associated with diverse vestibular disorders, necessitating thorough evaluation and intervention to prevent falls and injuries.
Related Concept Videos
01:15Equilibrium and Balance
4.9K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
4.9K
01:29The Vestibular System
40.1K
The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
40.1K
01:22Pathophysiology of Vomiting
1.0K
Vomiting is a complex physiological response to expel harmful or irritating substances from the body. It's a defensive mechanism triggered by stimuli like poisons, microbial toxins, cytotoxic drugs, and mechanical abdominal distension. The process is centrally coordinated by the vomiting (or emetic) center located in the medulla of the brainstem. This area, rich in muscarinic M1, histamine H1, neurokinin 1 (NK1), and serotonin 5-HT3 receptors, coordinates the act of vomiting through...
1.0K
01:28Dysrhythmias II: Classification of Tachyarrhythmias
128
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
128
01:28Mechanism of Cardiac Arrhythmias
1.0K
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
1.0K
01:21Aneurysm II: Clinical Manifestations and Diagnostic Studies
19
Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
19