[Mitral stenosis and partial abnormal pulmonary venous return. 3 case reports]

The association of mitral stenosis with an abnormal pulmonary venous return in the absence of an atrial septal defect, is a rare occurrence, and three cases are reported here. If this diagnosis is suggested by the chest Xray, it is confirmed by haemodynamic investigation, which defines the abnormal pulmonary drainage, guages the size of the left-right shunt, and demonstrates the degree of mitral steonsis. If the defect is poorly tolerated, surgical treatment is required.