Related Experiment Video
Updated: Mar 30, 2026
09:36
Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
Published on: December 22, 2023
1.9K
[Arytmogenic ventricular cardiomyopathy].
Soudni Lekarstvi
|November 21, 2015
Summary
Arrhythmogenic ventricular cardiomyopathy (AVC) is a genetic heart condition affecting cell-cell junctions. Mutations cause heart muscle instability, leading to fibrofatty replacement, arrhythmias, and sudden cardiac death, particularly in young adults.
Area of Science:
- Cardiology
- Genetics
- Molecular Biology
Context:
- Arrhythmogenic ventricular cardiomyopathy (AVC) is a primary cardiomyopathy with a prevalence of 1:2000-1:5000.
- Numerous studies have investigated AVC's causes, pathogenesis, diagnosis, and treatment.
- AVC is a genetically determined disease involving proteins crucial for cell-cell junctions.
Purpose:
- To elucidate the underlying causes and pathogenesis of arrhythmogenic ventricular cardiomyopathy.
- To explore diagnostic aspects and potential treatment options for AVC.
- To understand the genetic basis and molecular mechanisms of AVC.
Summary:
- Mutations in myocardial intercalated disc proteins, primarily desmosomal proteins like plakoglobin, are implicated in AVC.
- These mutations lead to electromechanical instability, cardiomyocyte degeneration, and subsequent fibrofatty replacement and inflammation of the myocardium.
- AVC presents with structural heart changes, arrhythmias, and has three variants: right ventricular, biventricular, and left ventricular predominance.
Impact:
- Clinical findings have informed diagnostic strategies and the development of Task Force Criteria for AVC diagnosis.
- AVC is significant due to its frequent presentation as sudden cardiac death in young adults.
- Understanding AVC's genetic and molecular basis is crucial for early diagnosis and intervention to prevent sudden cardiac death.
Related Concept Videos
01:25Cardiomyopathy I: Introduction and Classification
800
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...
800
01:29Cardiomyopathy IV: Restrictive Cardiomyopathy
809
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...
809
01:29Disturbances in Heart Rhythm
3.6K
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...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
3.6K
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
947
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
947
01:30Cardiomyopathy II: Dilated Cardiomyopathy
751
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,...
751
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
697
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...
697