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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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Heart Failure II: Pathophysiology01:29

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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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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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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 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 V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

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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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[Diastolic dysfunction in hypertrophic nonobstructive cardiomyopathy].

D V Bogdanov

    Vestnik Rossiiskoi Akademii Meditsinskikh Nauk
    |March 31, 2015
    PubMed
    Summary

    In hypertrophic nonobstructive cardiomyopathy (NHCM), diastolic dysfunction is common, primarily of the hypertrophic type. This dysfunction, along with impaired contractility, contributes to heart failure symptoms and syncope.

    Area of Science:

    • Cardiology
    • Cardiovascular Medicine
    • Cardiac Imaging

    Context:

    • Hypertrophic nonobstructive cardiomyopathy (NHCM) is a complex condition.
    • Understanding left ventricular (LV) diastolic dysfunction is crucial in NHCM management.
    • Doppler echocardiography is a key diagnostic tool.

    Purpose:

    • To evaluate the prevalence and types of LV diastolic dysfunction in NHCM patients.
    • To correlate diastolic dysfunction with clinical manifestations and cardiac structure.
    • To identify associated contractile dysfunction in NHCM.

    Summary:

    • 83% of 97 NHCM patients exhibited LV diastolic dysfunction, predominantly hypertrophic type.
    • Diastolic dysfunction correlated with NYHA class III heart failure and syncope.

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  • Both left and right ventricular hypertrophy severity influenced diastolic dysfunction; 94% had impaired contractility.

    • Impact:

    • Highlights the high prevalence of diastolic dysfunction in NHCM.
    • Emphasizes the link between diastolic dysfunction, clinical symptoms, and biventricular hypertrophy.
    • Underscores the frequent co-occurrence of diastolic and contractile dysfunction in NHCM.