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Related Experiment Videos

Morphology and classification of complete atrioventricular defects.

G P Piccoli, J L Wilkinson, F J Macartney

    British Heart Journal
    |December 1, 1979
    PubMed
    Summary

    This study classified atrioventricular valve leaflets in 70 hearts with common atrioventricular orifices. Leaflet morphology, particularly the anterior leaflets, allowed for detailed subdivision of these complex cardiac defects.

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    Area of Science:

    • Cardiovascular Anatomy
    • Congenital Heart Disease
    • Cardiac Morphology

    Background:

    • Atrioventricular defects represent complex congenital heart conditions.
    • Understanding the detailed morphology of atrioventricular valves is crucial for classification.
    • Previous classifications may not fully capture the spectrum of leaflet variations.

    Purpose of the Study:

    • To anatomically classify hearts with common atrioventricular orifices and atrioventricular defects.
    • To investigate the morphology and arrangement of atrioventricular valve leaflets.
    • To establish a detailed subdivision based on leaflet disposition.

    Main Methods:

    • Anatomical study of 70 necropsied human hearts.
    • Inclusion criteria: situs solitus, atrioventricular concordance, common atrioventricular orifice, and atrioventricular defects.

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  • Classification based on the commissural pattern and papillary muscle insertion of five distinguished valve leaflets, focusing on anterior leaflet morphology.

    • Main Results:

    • Hearts were subdivided based on the disposition of the anterior leaflets.
    • Variations included left and right anterior leaflets committed to respective ventricles, bridging between ventricles, or attachment to specific papillary muscles.
    • Increased bridging of the left anterior leaflet correlated with decreased size of the right anterior leaflet.

    Conclusions:

    • A detailed classification of atrioventricular valve leaflets is possible in hearts with common atrioventricular orifices.
    • Morphological variations of the anterior leaflets provide a basis for subdividing these defects.
    • Findings contribute to a more comprehensive understanding of atrioventricular septal defects.