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Related Experiment Videos

Increased mitral-aortic separation in discrete subaortic stenosis.

G C Rosenquist, E B Clark, H A McAllister

    Circulation
    |July 1, 1979
    PubMed
    Summary
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    Discrete subaortic stenosis (DSS) is associated with increased mitral-aortic separation (MAS). This finding may aid in the clinical description and surgical resection of DSS.

    Area of Science:

    • Cardiovascular Pathology
    • Congenital Heart Disease

    Background:

    • Discrete subaortic stenosis (DSS) is a congenital heart defect characterized by obstruction below the aortic valve.
    • The relationship between DSS and mitral-aortic separation (MAS) has not been extensively studied.

    Purpose of the Study:

    • To investigate the hypothesis that mitral-aortic separation (MAS) is increased in patients with discrete subaortic stenosis (DSS).

    Main Methods:

    • Examination of 22 heart specimens with DSS, excluding other congenital anomalies.
    • Comparison of MAS measurements with 80 normal heart specimens.
    • Analysis of the anatomical relationship between the subaortic obstruction and the mitral-aortic junction.

    Main Results:

    • The mean MAS in specimens with DSS was nearly double that of normal specimens (4.9 mm vs 2.5 mm).

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  • The range of MAS was significantly increased in DSS specimens compared to normal controls.
  • A decreased mean aortic annulus diameter was observed in DSS specimens.

    • Conclusions:

    • Discrete subaortic stenosis is associated with significantly increased mitral-aortic separation.
    • These findings provide valuable data for echocardiographers, angiocardiographers, and surgeons involved in the diagnosis and treatment of DSS.