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Related Concept Videos

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 I: Introduction and Classification01:25

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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 V: Interprofessional Care01:29

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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

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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 IV: Restrictive Cardiomyopathy01:29

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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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Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
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Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
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Hypertrophic obstructive cardiomyopathy.

Josef Veselka1, Nandan S Anavekar2, Philippe Charron3

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Hypertrophic obstructive cardiomyopathy (HOCM) is an inherited heart muscle disease causing thickened heart walls and outflow obstruction. Diagnosis involves clinical evaluation and imaging, with treatments like defibrillators or septal reduction therapy for severe cases.

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Area of Science:

  • Cardiology
  • Genetics
  • Internal Medicine

Background:

  • Hypertrophic obstructive cardiomyopathy (HOCM) is a primary inherited myocardial disease.
  • It is characterized by cardiac hypertrophy (wall thickness ≥15 mm) unrelated to abnormal loading conditions.
  • Left ventricular outflow tract obstruction (LVOTO) is a key feature, defined as ≥30 mm Hg.

Purpose of the Study:

  • To define the key characteristics of hypertrophic obstructive cardiomyopathy.
  • To outline diagnostic approaches for HOCM.
  • To summarize current management strategies for HOCM and its complications.

Main Methods:

  • Diagnosis is typically suspected based on clinical presentation.
  • Imaging modalities are crucial for confirmation and assessment of severity.
  • Risk stratification for sudden cardiac death and other complications is essential.

Main Results:

  • Common symptoms include dyspnea, chest pain, palpitations, and syncope.
  • Patients face increased risks of sudden cardiac death, heart failure, and atrial fibrillation.
  • Effective management strategies exist for identified risks and symptoms.

Conclusions:

  • HOCM requires prompt diagnosis and risk assessment.
  • Management involves targeted therapies such as cardioverter-defibrillator implantation for sudden cardiac death risk.
  • Septal reduction therapy (myectomy or alcohol septal ablation) is recommended for severe LVOTO symptoms.
  • Life-long anticoagulation is indicated following atrial fibrillation episodes.