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

Criteria for Causality: Bradford Hill Criteria - II01:28

Criteria for Causality: Bradford Hill Criteria - II

1.2K
The Bradford Hill criteria serve as guidelines for establishing causative links in epidemiological research. Beyond Strength, Consistency, Specificity, and Temporality, key criteria also include Biological Gradient, Plausibility, Coherence, Experiment, and Analogy. These principles assist scientists in assessing the likelihood of causation in complex biological contexts. Below is a summary of these concepts:
1.2K
Criteria for Causality: Bradford Hill Criteria - I01:30

Criteria for Causality: Bradford Hill Criteria - I

1.1K
The Bradford Hill criteria are a group of principles that provide a framework to determine a causal relationship between a specific factor and a disease. There are nine criteria that are pivotal in assessing causality in epidemiological studies. Here's a closer look at Strength, Consistency, Specificity, and Temporality criteria with definitions and examples:
1.1K
Electro-mechanical Systems01:19

Electro-mechanical Systems

1.6K
Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
1.6K
Yield Criteria for Ductile Materials under Plane Stress01:25

Yield Criteria for Ductile Materials under Plane Stress

505
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
505
Criteria for Aromaticity and the Hückel 4n + 2 Rule01:20

Criteria for Aromaticity and the Hückel 4n + 2 Rule

13.0K
Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs from benzene, as they are unstable and not aromatic. So, what are the structural characteristics of unsaturated compounds categorized as aromatic?  
For the first time, Eric Hückel, a German chemical physicist, derived a set of structural features for a compound to be classified as aromatic. This is now known as Hückel’s rule or the 4n +...
13.0K
Block Diagram Reduction01:22

Block Diagram Reduction

548
The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
548

You might also read

Related Articles

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

Sort by
Same author

Systematic multi-domain screening of lead-specific electrocardiographic features associated with sudden cardiac death.

Journal of electrocardiology·2026
Same author

Coronary Stenosis Location, Revascularization Strategy, and Sudden Cardiac Death in Chronic and Acute Coronary Syndromes.

JACC. Cardiovascular interventions·2026
Same author

Acute atrial fibrillation and flutter treated electively: rationale and design of the randomized controlled AFFELECT trial.

European heart journal open·2026
Same author

A child with a large ostium secundum atrial septal defect, pulmonary hypertension, and the characteristic Crochetage electro-vectorcardiographic pattern.

Journal of electrocardiology·2026
Same author

Prognostic implications of intraventricular conduction disorders for the risk of sudden cardiac death in cardiac patients.

Heart rhythm·2026
Same author

Performance of the 12-lead ECG in predicting short- and long-term risk of sudden cardiac death.

NPJ digital medicine·2026
Same journal

Critical Appraisal of Self-Supervised Contrastive Pretraining for Extreme Few-Shot ECG Classification.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

An Unusual Etiology of Bayés' Syndrome: Fabry Disease.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Interpreting ECG-Based Risk Stratification in Women With INOCA: Methodological Considerations From the WISE Cohort.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Electrocardiographic Repolarization Changes Following Orchiectomy: Insights Into QT Interval Prolongation and Clinical Implications.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Critique on Integrated Heart Sound-Electrocardiogram Synchronization System for Early Detecting Left Ventricular Systolic Dysfunction in Pediatric Populations.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Beyond Training Stability: The Need for Clinical Generalizability and Explainability in Self-Supervised ECG Models.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
See all related articles

Related Experiment Video

Updated: Jan 26, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
12:45

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

10.9K

Re-evaluating the electro-vectorcardiographic criteria for left bundle branch block.

Andrés Ricardo Pérez-Riera1, Raimundo Barbosa-Barros2, Rodrigo Daminello-Raimundo1

  • 1Study Design and Scientific Writing Laboratory, ABC Faculty of Medicine, Santo André, São Paulo, Brazil.

Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc
|April 3, 2019
PubMed
Summary
This summary is machine-generated.

New criteria for left bundle branch block (LBBB) help identify patients who will respond to cardiac resynchronization therapy. Stricter criteria, including QRS duration and slurring, improve patient selection for this treatment.

Keywords:
QRS durationQRS notched/slurred R waves in lateral leadscardiac resynchronization therapyconcordant and appropriate discordanceleft bundle branch block

More Related Videos

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
06:34

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

4.6K
Mouse Embryonic Lung Culture, A System to Evaluate the Molecular Mechanisms of Branching
07:32

Mouse Embryonic Lung Culture, A System to Evaluate the Molecular Mechanisms of Branching

Published on: June 30, 2010

18.9K

Related Experiment Videos

Last Updated: Jan 26, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
12:45

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

10.9K
Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
06:34

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

4.6K
Mouse Embryonic Lung Culture, A System to Evaluate the Molecular Mechanisms of Branching
07:32

Mouse Embryonic Lung Culture, A System to Evaluate the Molecular Mechanisms of Branching

Published on: June 30, 2010

18.9K

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Diagnostics

Background:

  • Left bundle branch block (LBBB) diagnosis and prognosis are areas of increasing clinical interest.
  • Accurate LBBB criteria are crucial for patient management and therapeutic decisions.

Purpose of the Study:

  • To provide an overview of diagnostic and prognostic aspects of various left bundle branch block criteria.
  • To highlight the role of specific criteria in predicting response to cardiac resynchronization therapy (CRT).

Main Methods:

  • Review of current literature on left bundle branch block diagnostic criteria.
  • Analysis of the relationship between QRS duration, morphology, and CRT response.
  • Inclusion of ST/T wave concordance/discordance and vectorcardiography findings.

Main Results:

  • Stricter LBBB criteria, characterized by longer QRS duration and QRS slurring/notching, are associated with better identification of CRT responders.
  • ST/T wave patterns and vectorcardiographic data offer potential for refining LBBB diagnostic criteria.

Conclusions:

  • Refined left bundle branch block criteria can enhance the selection of patients for cardiac resynchronization therapy.
  • Further research into advanced criteria, including vectorcardiography, may improve diagnostic and prognostic accuracy in LBBB.