Background: Partial anomalous pulmonary venous connection (PAPVC) is a rare congenital anomaly in which one or more pulmonary veins are connected to the venous circulation leading to left to right heart shunt. Although correction of anomalous pulmonary venous connection is achieved through surgery, there are rare instances where the abnormal pulmonary vein has dual connection to both left atrium and the major systemic veins. Under these circumstances catheter-based treatment might become a feasible option.
Case presentation: We report a case of atrial septal defect (ASD) and dual drainage of left upper pulmonary vein, which were successfully addressed by occluder devices and followed carefully while detecting early clot formation behind the implanted device in the vertical vein.
Conclusion: For comprehensive evaluation of patients with ASD, assessment of pulmonic veins is crucial and in the presence of a vertical vein, the dual drainage of pulmonic veins should be considered.