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Related Concept Videos

Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
137
Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

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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...
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

118
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...
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Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

23
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...
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

31
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Related Experiment Video

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Beyond the type 1 pattern: comprehensive risk stratification in Brugada syndrome.

Kwan Yau Kan1,2, Aléchia Van Wyk1, Toby Paterson1,3

  • 1Department of Natural Sciences, Middlesex University, The Burroughs, London, NW4 4BT, UK.

Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing
|August 6, 2025
PubMed
Summary

Brugada Syndrome (BrS) risk stratification is challenging. A multimodal approach using ECG, imaging, and computational markers improves identification of patients at risk for sudden cardiac death.

Keywords:
BrS, ventricular arrhythmiaBrugada syndromeICDSCD, implantable cardioverter defibrillatorVA, sudden cardiac death

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Area of Science:

  • Cardiology
  • Genetics
  • Medical Diagnostics

Background:

  • Brugada Syndrome (BrS) is an inherited cardiac ion channelopathy causing sudden cardiac death from ventricular arrhythmias.
  • Diagnosis relies on Type 1 ECG patterns, but risk stratification in asymptomatic patients is difficult.

Purpose of the Study:

  • To review current and emerging methods for Brugada Syndrome risk stratification.
  • To highlight the importance of an integrated, multimodal approach for improved patient outcomes.

Main Methods:

  • Review of electrocardiographic (ECG), electrophysiological, imaging, and computational markers.
  • Analysis of non-invasive ECG indicators, adjunctive diagnostic tools, and advanced imaging modalities.
  • Inclusion of invasive electrophysiological studies, risk scoring systems, and machine learning models.

Main Results:

  • ECG markers (e.g., β-angle, fragmented QRS) and dynamic tests predict arrhythmic events.
  • Imaging reveals subclinical structural abnormalities, challenging the purely electrical disorder concept.
  • Risk scores and machine learning offer personalized risk assessment.

Conclusions:

  • An integrated, multimodal strategy is crucial for accurate BrS risk stratification.
  • Optimized risk assessment guides implantable cardioverter-defibrillator decisions and improves outcomes in high-risk patients.