Patho-histological findings on pulmonary biopsy in patients after mitral commissurotomy and morphometric studies of the upper and lower pulmonary lobes (author's transl)

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Histological morphometric examination of the lungs of 22 patients with acquired mitral stenosis and 15 control persons is reported. The quotient obtained from wall thickness and lumen diameter of the pulmonary venules gives a reliable estimation of the haemodynamic changes found in the pulmonary vascular system in mitral stenosis patients. The typical changes in the pulmonary vascular system in these patients were observed particularly in the lower pulmonary lobe and to a lesser extent in the lingular of the upper lobe. Biopsy of the lower lobe is preferable in mitral stenosis operations because it results in a better clinical diagnosis.