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Related Experiment Videos

Pulmonary function in the Marfan syndrome.

E A Streeten, E A Murphy, R E Pyeritz

    Chest
    |March 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Pulmonary function abnormalities in Marfan syndrome are often due to incorrect height measurements or chest deformities, not lung tissue defects. Adjusting calculations corrects most apparent issues in patients without severe thoracic abnormalities.

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    Area of Science:

    • Pulmonary Medicine
    • Genetics
    • Cardiovascular Diseases

    Background:

    • Marfan syndrome is a genetic connective tissue disorder.
    • Reported pulmonary function abnormalities are common in Marfan syndrome patients.
    • The underlying causes of these abnormalities require further investigation.

    Purpose of the Study:

    • To investigate the causes of pulmonary function abnormalities in Marfan syndrome.
    • To differentiate between abnormalities caused by measurement errors/chest deformities and intrinsic lung defects.

    Main Methods:

    • Retrospective analysis of anthropometric and pulmonary function tests in 79 Marfan syndrome patients.
    • Comparison with 10 matched control subjects without connective tissue disorders.
    • Analysis of spirometric values using both standing height and sitting height for expected value calculations.

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    Main Results:

    • Patients showed reduced FVC and TLC when expected values were based on standing height.
    • When using sitting height, patients without severe thoracic deformities showed normal spirometry.
    • Patients with moderate-to-severe pectus excavatum or scoliosis exhibited significant reductions in lung volumes (TLC, FVC, FEV1).

    Conclusions:

    • Pulmonary function abnormalities in Marfan syndrome are frequently explained by inappropriate use of standing height for expected value calculations or by thoracic cage deformities.
    • There is no evidence of a clinically significant connective tissue defect of the lung parenchyma in Marfan patients without chest wall deformities.
    • Standard pulmonary function tests may overestimate abnormalities if not accounting for these factors.