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Hypertrophic cardiomyopathy in infants: clinical features and natural history

B J Maron, A J Tajik, H D Ruttenberg

    Circulation
    |January 1, 1982
    PubMed

    Insights

    Infantile hypertrophic cardiomyopathy presents uniquely, often with congestive heart failure and outflow obstruction. Early diagnosis and management are crucial for improving outcomes in affected infants.

    Area of Science:

    • Pediatric Cardiology
    • Cardiovascular Pathology
    • Congenital Heart Disease

    Background:

    • Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
    • Infantile HCM exhibits distinct clinical and morphological features compared to adult forms.
    • Early identification of HCM in infants is critical for timely intervention.

    Purpose of the Study:

    • To describe the clinical and morphologic characteristics of hypertrophic cardiomyopathy in infants.
    • To differentiate infantile HCM from other congenital cardiac malformations.
    • To evaluate prognostic indicators in infants with HCM.

    Main Methods:

    • Retrospective analysis of 20 infants diagnosed with HCM within the first year of life.
    • Clinical evaluation, electrocardiography (ECG), chest radiography, left-heart catheterization, and echocardiography/necropsy.
    • Assessment of ventricular outflow obstruction and septal hypertrophy.

    Main Results:

    • Infants often presented with congestive heart failure and cardiac enlargement, mimicking other congenital heart defects.
    • Significant left and right ventricular outflow obstruction was common, unlike in older patients.
    • Asymmetric septal hypertrophy was a consistent finding, suggesting congenital origins.
    • Congestive heart failure in the first year of life was associated with a high mortality rate.

    Conclusions:

    • Infantile HCM has unique presentations, including outflow tract obstruction and early-onset heart failure.
    • Congenital factors likely play a significant role in the development of infantile HCM.
    • Prompt recognition and management of heart failure are vital for improving survival in infants with HCM.

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