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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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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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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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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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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...
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ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

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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...
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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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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.
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

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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,...
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Related Experiment Video

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Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding
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[Arrhythmogenic left ventricular cardiomyopathy].

Štěpán Havránek, Tomáš Paleček, Petr Kuchynka

    Vnitrni Lekarstvi
    |October 8, 2016
    PubMed
    Summary

    Arrhythmogenic left ventricular cardiomyopathy (ALVC) involves fibrofatty tissue replacing heart muscle, causing arrhythmias. It shares features with arrhythmogenic right ventricular cardiomyopathy, suggesting a spectrum of arrhythmogenic cardiomyopathy.

    Area of Science:

    • Cardiology
    • Genetics
    • Medical Imaging

    Background:

    • Arrhythmogenic left ventricular cardiomyopathy (ALVC) is a rare condition characterized by myocardial fibrofatty replacement and left ventricular arrhythmias.
    • It shares pathological and prognostic features with arrhythmogenic right ventricular cardiomyopathy, suggesting a spectrum of arrhythmogenic cardiomyopathy.

    Purpose of the Study:

    • To elucidate the characteristics and diagnostic criteria of ALVC.
    • To highlight its place in the differential diagnosis of ventricular tachycardia.

    Main Methods:

    • Review of ALVC features, including genetic links to desmosomal proteins.
    • Emphasis on cardiac magnetic resonance imaging findings, specifically late gadolinium enhancement.
    • Histopathological correlation of imaging findings.

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    Main Results:

    • ALVC involves progressive fibrofatty replacement of the left ventricle.
    • Late gadolinium enhancement in a subepicardial to midwall distribution is a key diagnostic marker.
    • Autosomal dominant mutations in desmosomal genes are implicated.

    Conclusions:

    • ALVC is part of a spectrum of arrhythmogenic cardiomyopathy, alongside ALVC.
    • Diagnosis relies on ventricular arrhythmias, specific cardiac MRI findings, and genetic confirmation.
    • ALVC is crucial in the differential diagnosis for non-ischemic ventricular tachycardia.