Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Dysrhythmias VII: Nursing Management of Dysrhythmias01:25

Dysrhythmias VII: Nursing Management of Dysrhythmias

555
Nursing management of dysrhythmias involves the following:AssessmentSubjective Assessment:The initial step involves gathering patient-reported symptoms such as dizziness, palpitations, and chest discomfort. It is crucial to collect a detailed history, including previous heart conditions, current medication use, and lifestyle factors like caffeine and alcohol consumption.Objective Assessment:This involves observing clinical signs such as jugular venous distention, cool and pale skin, and...
555
Decreased pulse rate01:14

Decreased pulse rate

1.1K
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...
1.1K
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

489
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
489
The Parasympathetic Nervous System01:14

The Parasympathetic Nervous System

118.3K
Overview
118.3K
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

847
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
847
Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

803
Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
803

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Comparison between the fast and the traditional nitroglycerin head-up tilt test in paediatric population.

International journal of cardiology·2026
Same author

Cardiac resynchronization therapy in atrial fibrillation: do all patients need atrioventricular node ablation?

European heart journal·2026
Same author

Determinants of carotid sinus hypersensitivity in patients with suspected reflex syncope.

Clinical autonomic research : official journal of the Clinical Autonomic Research Society·2026
Same author

Reduced baroreflex sensitivity in situational syncope compared with vasovagal syncope: Evidence for different baroreflex profile.

Autonomic neuroscience : basic & clinical·2026
Same author

Indications, contraindications, and step-by-step methodology for performing carotid sinus massage in patients presenting with syncope : A scientific statement of an Ad Hoc Syncope Consortium endorsed by: the European Autonomic Society (EFAS), Gruppo Italiano Multidisciplinare Syncope (GIMSI) and European Geriatric Medicine Society (EuGMS).

Clinical autonomic research : official journal of the Clinical Autonomic Research Society·2026
Same author

Vasovagal syncope: the role of 24 h ambulatory blood pressure monitoring.

European heart journal supplements : journal of the European Society of Cardiology·2026

Related Experiment Video

Updated: Apr 19, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

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

Published on: March 21, 2013

22.2K

Pacing for neurally-mediated syncope: How to decide?

Michele Brignole1

  • 1Arrhythmologic Center, Department of Cardiology, Ospedali del Tigullio, Lavagna, Italy. mbrignole@ASL4.liguria.it.

Cardiology Journal
|December 20, 2014
PubMed
Summary

Cardiac pacing may help severe reflex syncope, particularly the cardio-inhibitory type. It is a last resort for selected patients over 40 with recurrent injuries and absent prodromes.

Area of Science:

  • Cardiology
  • Neurology

Background:

  • Neurally-mediated syncope presents a wide clinical spectrum, from typical vasovagal syncope to reflex syncope with unclear triggers.
  • Clinical overlap complicates patient selection for cardiac pacing, as the reflex involves both hypotension and cardio-inhibition.

Purpose of the Study:

  • To evaluate the efficacy of cardiac pacing in patients with neurally-mediated syncope, focusing on the cardio-inhibitory component.
  • To establish criteria for selecting patients who may benefit from permanent cardiac pacing for reflex syncope.

Main Methods:

  • Clinical evaluation to identify a dominant cardio-inhibitory reflex in patients with neurally-mediated syncope.
  • Assessment of patient age, syncope severity, recurrence, injury, and prodromal symptoms for pacing candidacy.

More Related Videos

Programmed Electrical Stimulation in Mice
07:29

Programmed Electrical Stimulation in Mice

Published on: May 26, 2010

21.5K
Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice
08:05

Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice

Published on: June 29, 2022

3.8K

Related Experiment Videos

Last Updated: Apr 19, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

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

Published on: March 21, 2013

22.2K
Programmed Electrical Stimulation in Mice
07:29

Programmed Electrical Stimulation in Mice

Published on: May 26, 2010

21.5K
Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice
08:05

Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice

Published on: June 29, 2022

3.8K

Main Results:

  • Cardiac pacing is effective when the cardio-inhibitory reflex is dominant, as it does not prevent vasodilation or hypotension.
  • Similar efficacy of pacing is observed in patients with a dominant cardio-inhibitory reflex, regardless of the specific clinical presentation.
  • Recurrence of syncope can still occur in a minority of patients despite cardiac pacing.

Conclusions:

  • Cardiac pacing should be considered a last-choice treatment for highly selected patients, typically those aged 40 years or older with severe, recurrent reflex syncope and frequent injuries, often lacking prodromes.
  • Establishing a clear link between symptoms and the cardio-inhibitory reflex is crucial before initiating permanent pacing.