Nine patients who had undergone surgery for partial anomalous pulmonary venous connection have been followed up for from 1 to 6 years. Chest X-rays, ECG, and right heart catheterization in all nine and RI angiogram, SVC angiogram, lung scintigram and PA angiogram in six patients with a anomalous pulmonary venous drainage to the SVC are included in follow up studies. An improvement in chest roentgenograms was observed in six and no change in three. In electrocardiograms, coronary sinus rhythm was seen in two and nodal rhythm in one. One patient with coronary sinus rhythm and another with nodal rhythm had bradycardia. Seven had normal PA pressures and two had slightly elevated PA pressures. None had marked narrowing nor obstruction of the SVC. In two patients who had one or more pulmonary vein draining directly into the SVC, the pulmonary venous return was abnormal, but these two patients were asymptomatic. It is concluded that the present surgical technique with the use of a Teflon patch is adequate for cases in which an anomalous vein drainage is located at the lower portion of the SVC. In patients with an anomalous vein drainage into the high portion of the SVC, Chartrand's method or Lewin's method, which does not reyuire use of prosthetic materials, may be preferable.