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[Spherical remodeling of left atrium in hypertrophic nonobstructive cardiomyopathy]

D V Bogdanov

    Kardiologiia
    |July 31, 2012
    PubMed

    Insights

    Hypertrophic cardiomyopathy (HCM) often causes spherical remodeling of the left atrium (LA), impairing its contractility. This study identified this common finding in 60% of HCM patients, including nonobstructive forms.

    Area of Science:

    • Cardiology
    • Cardiac Imaging
    • Pathophysiology

    Background:

    • Hypertrophic cardiomyopathy (HCM) is a primary myocardial disease.
    • Left atrial (LA) remodeling is a known complication in cardiovascular diseases.
    • Understanding LA mechanics in HCM is crucial for risk stratification.

    Purpose of the Study:

    • To investigate the characteristics of left atrial (LA) remodeling in patients with hypertrophic cardiomyopathy (HCM).
    • To assess the impact of LA remodeling on LA contractility in HCM.
    • To propose a novel metric, the remodeling coefficient, for quantifying LA shape changes.

    Main Methods:

    • Echocardiography was performed on 69 patients with nonobstructive HCM.
    • Systolic and diastolic longitudinal and transversal dimensions of the LA were measured.
    • LA contractility parameters were calculated, and a remodeling coefficient (transversal/longitudinal dimensions) was derived.

    Main Results:

    • Spherical remodeling of the LA was observed in 60% of all examined HCM patients.
    • This remodeling was associated with reduced LA contractility.
    • The remodeling coefficient effectively quantified the degree of LA spherical deformation.

    Conclusions:

    • Spherical LA remodeling and reduced contractility are prevalent in HCM, even in nonobstructive forms.
    • The proposed remodeling coefficient may serve as a useful quantitative marker for LA dysfunction in HCM.
    • Further research is warranted to explore the prognostic implications of LA remodeling in HCM.

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