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Related Experiment Videos

The straddling mitral valve: morphological observations and clinical implications.

R M Freedom, R Bini, R Dische

    European Journal of Cardiology
    |August 1, 1978
    PubMed
    Summary
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    Straddling mitral valve, often associated with underdeveloped left ventricles and conotruncal anomalies, requires careful diagnosis. Echocardiography and angiography aid in identifying this rare congenital heart defect.

    Area of Science:

    • Pediatric Cardiology
    • Congenital Heart Disease
    • Cardiac Morphology

    Background:

    • Straddling and overriding mitral valve represent rare congenital heart anomalies.
    • These defects are often associated with other complex cardiac malformations and abnormal visceral situs.

    Purpose of the Study:

    • To describe the morphological features of patients with straddling or overriding mitral valve.
    • To identify associated cardiac anomalies and patterns of visceral situs.
    • To suggest diagnostic considerations for this condition.

    Main Methods:

    • Morphological analysis of 23 patients with straddling or overriding mitral valve.
    • Review of clinical data including echocardiography and angiography findings.

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    Main Results:

    • Levocardia and situs solitus were present in most patients.
    • Associated anomalies included double outlet right ventricle, D-transposition of the great arteries, tricuspid atresia, and endocardial cushion defect.
    • Left ventricular size correlated with the mitral valve orifice area connected to it.
    • Subpulmonary obstruction was common in patients with double outlet right ventricle.

    Conclusions:

    • Straddling mitral valve is frequently linked to underdeveloped left ventricles and conotruncal anomalies.
    • Diagnosis should be suspected in patients with double outlet right ventricle or endocardial cushion defect and left ventricular hypoplasia.
    • Advanced imaging techniques like echocardiography and angiography are crucial for diagnosis.