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Related Concept Videos

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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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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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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Myocarditis II: Clinical Features and Diagnostic Tests01:27

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Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Pericarditis II: Clinical Features and Diagnostic Tests01:19

Pericarditis II: Clinical Features and Diagnostic Tests

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Pericarditis is distinguished by inflammation of the pericardium, the fibrous sac that encases the heart. It can be acute, lasting less than six weeks, or chronic, persisting for over three months. Understanding its clinical manifestations and diagnostic findings is crucial for timely and effective management.Clinical ManifestationsWhile pericarditis can be asymptomatic, it usually presents with characteristic symptoms such as:Chest Pain: The most characteristic symptom of pericarditis is chest...
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Atherosclerosis II: Clinical Manifestations and Diagnostic Tests01:27

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Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
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Genetic Testing for Cardiomyopathies in Clinical Practice.

Jodie Ingles1, Richard D Bagnall2, Christopher Semsarian1

  • 1Agnes Ginges Centre for Molecular Cardiology, Centenary Institute, Sydney, New South Wales, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia; Department of Cardiology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.

Heart Failure Clinics
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Summary

Cardiac genetic testing for inherited cardiomyopathies is common, aiding diagnosis and family screening. Careful interpretation of genetic variants is crucial to avoid potential harm and ensure optimal patient outcomes.

Keywords:
Arrhythmogenic right ventricular cardiomyopathyDilated cardiomyopathyGenetic counselingGenetic testingHypertrophic cardiomyopathy

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Area of Science:

  • Cardiology
  • Genetics
  • Medical Diagnostics

Background:

  • Cardiac genetic testing for inherited cardiomyopathies is now standard practice.
  • Technological advancements have improved test comprehensiveness and affordability.
  • Increased testing has enhanced understanding of disease genetics but also revealed challenges.

Purpose of the Study:

  • To discuss the routine use and implications of cardiac genetic testing.
  • To highlight the challenges in variant interpretation.
  • To emphasize a careful approach for optimal family outcomes.

Main Methods:

  • Review of current practices in cardiac genetic testing.
  • Discussion of genetic variant interpretation in inherited cardiomyopathies.
  • Analysis of the benefits and potential harms of genetic diagnosis.

Main Results:

  • Genetic testing provides valuable diagnostic information for cardiomyopathies.
  • Ascertaining causality for rare genetic variants remains a significant challenge.
  • Genetic diagnoses facilitate cascade testing and reproductive options for families.

Conclusions:

  • Cardiac genetic testing is a vital tool for managing inherited cardiomyopathies.
  • Careful interpretation of genetic findings is essential to mitigate potential harm.
  • A thoughtful approach ensures the best outcomes for affected families.