Related Experiment Video

Updated: Dec 6, 2025

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

10.8K

Real-time validation of the Sgarbossa and modified Sgarbossa criteria in intermittent left bundle branch block

Matthew G Cravens1, Shane F Ali1, Michael A Gibbs1

  • 1Department of Emergency Medicine, Carolinas Medical Center, Charlotte, NC, United States.

Journal of Electrocardiology
|October 12, 2020
PubMed

Insights

The modified Sgarbossa criteria help diagnose ST-elevation myocardial infarction in left bundle branch block patients. This study confirms their real-time diagnostic utility in acute cardiovascular emergencies.

Area of Science:

  • Cardiology
  • Medical Diagnostics
  • Electrocardiography

Background:

  • The modified Sgarbossa criteria are used for diagnosing ST-elevation myocardial infarction (STEMI) in patients with left bundle branch block (LBBB).
  • Previous evaluations of these criteria were retrospective, correlating ECG findings with biomarkers or cardiac catheterization.
  • The diagnostic accuracy in real-time clinical scenarios remained less understood.

Observation:

  • A case of acute cardiovascular emergency presented with intermittent left bundle branch block.
  • Serial electrocardiograms (ECGs) showed dynamic ST abnormalities in both narrow QRS beats and LBBB beats.
  • These dynamic ST changes occurred concurrently in both beat types.

Findings:

  • The observed dynamic ST abnormalities in narrow QRS beats mirrored those in LBBB beats.
  • This real-time correlation directly confirmed the applicability of the Sgarbossa and modified Sgarbossa criteria.
  • The study demonstrated the criteria's usefulness in diagnosing acute ST elevation during LBBB.

Implications:

  • Provides direct, real-time evidence supporting the modified Sgarbossa criteria in LBBB patients.
  • Enhances diagnostic capabilities for STEMI in challenging ECG presentations.
  • May improve timely intervention and patient outcomes in acute cardiovascular emergencies.

Keywords:
Left bundle branch blockST-elevation myocardial infarctionSgarbossa criteriaSmith modification of Sgarbossa criteriaTako-Tsubo syndrome

More Related Videos

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System10:17

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

1.4K
Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography07:11

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography

Published on: October 28, 2020

3.2K

Related Concept Videos

Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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...
347
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
117
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
240
Mitral Regurgitation II: Clinical Features and Diagnostic Tests01:23

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
174
Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
182
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
117