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

Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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.
Conduction System of the Heart01:19

Conduction System of the Heart

Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
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...
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...

You might also read

Related Articles

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

Sort by
Same author

Effect of cardiac resynchronisation therapy on occurrence of ventricular arrhythmia in patients with implantable cardioverter defibrillators undergoing upgrade to cardiac resynchronisation therapy devices.

Heart (British Cardiac Society)·2007
Same author

Non-paroxysmal junctional tachycardia with type I exit block.

Heart (British Cardiac Society)·2002
Same author

Triboelectric simulation of pacemaker malfunction.

Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology·2002
Same author

Report of the NASPE/NHLBI round table on future research directions in atrial fibrillation.

Pacing and clinical electrophysiology : PACE·2001
Same author

Radiofrequency treatment of hepatic neoplasms in patients with permanent pacemakers.

Mayo Clinic proceedings·2001
Same author

Breath-holding spells associated with significant bradycardia: successful treatment with permanent pacemaker implantation.

Pediatrics·2001
Same journal

Correction to I.M. Matters News: Sleep medicine for seniors.

Annals of internal medicine·2026
Same journal

Adverse Events After Same-Day COVID-19 and Influenza Vaccination Versus Influenza Vaccination Alone : A Target Trial Emulation.

Annals of internal medicine·2026
Same journal

Leveraging Real-World Evidence to Inform Regulatory, Clinical, and Coverage Decisions Related to Glucagon-Like Peptide-1-Based Therapies: Synopsis of a National Institute of Diabetes and Digestive and Kidney Diseases Workshop.

Annals of internal medicine·2026
Same journal

Methodological Approaches to Real-World Evidence Generation for Glucagon-like Peptide-1-Based Therapies: Synopsis of a National Institute of Diabetes and Digestive and Kidney Diseases Workshop.

Annals of internal medicine·2026
Same journal

Weekly and Biweekly Treatment With Bofanglutide Versus Semaglutide in Chinese Patients With Type 2 Diabetes : A Phase 2b Randomized Clinical Trial.

Annals of internal medicine·2026
Same journal

Grappling with GLP-1 prescribing.

Annals of internal medicine·2026
See all related articles

Related Experiment Video

Updated: Jun 26, 2026

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
10:08

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine

Published on: February 17, 2018

Pacemaker malfunction

D L Hayes1, R E Vlietstra

  • 1Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic, Rochester, MN 55905.

Annals of Internal Medicine
|October 15, 1993
PubMed
Summary
This summary is machine-generated.

Diagnosing pacemaker malfunction involves understanding four key electrocardiographic categories: failure to output, failure to capture, undersensing, and inappropriate rate. Recognizing true versus pseudomalfunctions and electromagnetic interference is crucial for effective troubleshooting.

More Related Videos

Sterile Pericarditis in Aachener Minipigs As a Model for Atrial Myopathy and Atrial Fibrillation
08:56

Sterile Pericarditis in Aachener Minipigs As a Model for Atrial Myopathy and Atrial Fibrillation

Published on: September 24, 2021

Translational Rabbit Model of Chronic Cardiac Pacing
06:14

Translational Rabbit Model of Chronic Cardiac Pacing

Published on: January 6, 2023

Related Experiment Videos

Last Updated: Jun 26, 2026

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
10:08

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine

Published on: February 17, 2018

Sterile Pericarditis in Aachener Minipigs As a Model for Atrial Myopathy and Atrial Fibrillation
08:56

Sterile Pericarditis in Aachener Minipigs As a Model for Atrial Myopathy and Atrial Fibrillation

Published on: September 24, 2021

Translational Rabbit Model of Chronic Cardiac Pacing
06:14

Translational Rabbit Model of Chronic Cardiac Pacing

Published on: January 6, 2023

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Electrophysiology

Background:

  • Cardiac pacing technology has advanced significantly due to engineering and microprocessor improvements.
  • The complexity of modern pacemakers can deter non-specialists from diagnosing malfunctions.
  • Electrocardiography is essential for identifying pacemaker issues.

Purpose of the Study:

  • To categorize the electrocardiographic signs of pacemaker malfunction.
  • To differentiate between true malfunctions and pseudomalfunctions.
  • To address the impact of electromagnetic interference on pacemaker function.

Main Methods:

  • Classifying pacemaker malfunction electrocardiographic findings into four primary categories.
  • Analyzing potential causes for each category, including true and pseudo-events.
  • Investigating environmental factors contributing to pacemaker malfunction.

Main Results:

  • Pacemaker malfunctions are systematically classifiable into: failure to output, failure to capture, undersensing, and inappropriate pacemaker rate.
  • Each category encompasses both genuine device failures and non-failure related pseudo-events.
  • Electromagnetic interference (EMI) presents a significant external cause of pacemaker malfunction.

Conclusions:

  • A structured approach to pacemaker malfunction diagnosis, based on categorized electrocardiographic signs, can reduce confusion.
  • Understanding the four categories and potential pseudomalfunctions aids in accurate troubleshooting.
  • Awareness of EMI sources is vital for managing pacemaker performance issues.