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Related Concept Videos

Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

826
The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's...
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Autonomic Nervous System01:22

Autonomic Nervous System

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The autonomic nervous system (ANS) is a critical component of the peripheral nervous system, primarily responsible for regulating involuntary bodily functions and maintaining homeostasis. It functions in tandem with the central nervous system (CNS) to seamlessly coordinate various physiological processes without the need for conscious control.
The ANS comprises two main divisions: the sympathetic and parasympathetic divisions. These divisions function antagonistically to maintain a dynamic...
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The Parasympathetic Nervous System01:14

The Parasympathetic Nervous System

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Overview
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Autonomic Nervous System: Overview01:26

Autonomic Nervous System: Overview

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The human nervous system is divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is composed of the brain and spinal cord, while the PNS contains nerve cells, clusters of nerve cells, and the sensory receptors that are outside the CNS. The PNS has two types of nerve cells: sensory (afferent) and motor (efferent). Sensory cells send signals to the CNS from receptors, and motor cells carry signals from the CNS to organs, muscles, and...
5.4K
Decreased pulse rate01:14

Decreased pulse rate

621
Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
621
Narcolepsy01:07

Narcolepsy

200
Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
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Related Experiment Video

Updated: Sep 14, 2025

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

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Autonomic syncope.

Jaume Francisco-Pascual1, Jose Manuel Medina Maguiña2, Nuria Rivas-Gándara3

  • 1Unitat d'Arritmies, Servei de Cardiologia, Hospital Universitari Vall d'Hebron, Barcelona, España; Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Barcelona Hospital Campus, Barcelona, España; Departament de Biologia Cel·lular de Fisiologia i d'Immunologia, Universitat Autònoma de Barcelona, Barcelona, Barcelona, España; CIBER de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III , Madrid, España.

Medicina Clinica
|July 18, 2025
PubMed
Summary
This summary is machine-generated.

Autonomic syncope, involving the autonomic nervous system, is better understood with new classifications. Recent advances improve diagnosis and personalized treatments for patients, enhancing their quality of life.

Keywords:
Hipotensión ortostáticaOrthostatic hypotensionReflex syncopeSyncopeSíncopeSíncope reflejoSíncope vasovagalVasovagal syncope

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Quantitative Autonomic Testing
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Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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Quantitative Autonomic Testing
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Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology
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Area of Science:

  • Neurology
  • Cardiology
  • Physiology

Background:

  • Autonomic syncope, a non-cardiac cause of fainting, involves autonomic nervous system dysfunction.
  • Phenotypic classification (bradycardic, hypotensive, mixed) aids diagnosis and treatment.

Purpose of the Study:

  • To review the latest updates on autonomic syncope.
  • To emphasize diagnostic tools and personalized treatment strategies.

Main Methods:

  • Narrative review of current literature.
  • Focus on diagnostic tools: ambulatory blood pressure monitoring and tilt table test.
  • Discussion of treatment advances: lifestyle, medications, and devices.

Main Results:

  • Phenotypic classification improves diagnostic precision.
  • Ambulatory blood pressure monitoring and tilt table testing are crucial.
  • Personalized treatments, including novel devices, show promise.

Conclusions:

  • Continued research enhances diagnostic accuracy and therapeutic effectiveness for autonomic syncope.
  • Improved management strategies significantly enhance patient quality of life.