Table 1. Factors causing morphological or functional pulmonary venous stenosis
Congenital pulmonary venous stenosis
    Circumscript pulmonary venous stenosis at the veno-atrial junctions of one or more pulmonary veins
    Congenital hypoplasia of one or more pulmonary veins
    Partial anomalous venous connection with stenosis of the aberrant veins
    Cor triatriatum
Acquired pulmonary vein stenosis
    Mediastinal or pulmonary neoplasms resulting in extrinsic compression of the pulmonary veins in their run through the mediastinum
    Fibrosing mediastinitis due to mediastinal granulomatous diseases
    Circumscript pulmonary venous stenosis as a complication of catheter-guided therapy for atrial fibrillation
    Post-operative pulmonary vein thrombosis after lung transplantation
    Right-sided lower lobectomy in case of drainage of the right middle lobe vein into the right inferior pulmonary vein with subsequent right middle lobe venous occlusion
    Intraluminal growth of neoplasms in the pulmonary veins or in the left atrium
    Post-operative stenosis after surgical correction of partial or total anomalous venous return
    Restenosis or stent-thrombosis after interventional dilatation of pulmonary venous-stenosis
Functional pulmonary venous stenosis
    Post-pneumonectomy syndrome after right-sided pneumonectomy with compression of the left pulmonary veins between the aorta and left ventricle in case of a cardiac shift into the right hemithorax