“…Although the true incidence of this anomaly is unknown,1) it has been stated to occur in 2.1-10%2)-4) of patients with congenital heart disease and 0.5% of the general population.5) Persist LSVC draining into the left atrium (LA) has been reported as rare. 6) Atresia and absence of the ostium of the CS in the right atrium (RA) is also rare, particularly so in the absence of a LSVC.7)-15) Among reported instances of termination of LSVC in the LA in which necropsy had been done, infero-posterior type of atrial septal defect (ASD) was the commonest associated congenital abnormality.8), 9) Infero-posterior type of ASD is also an uncommon type of ASD.1O) The studies suggest that when LSVC joins the LA, this vascular anomaly is part of a developmental complex in which abnormal termination of the CS and a defect in the postero-inferior angle of the atrial septum are also a part.11) The purpose of this communication is to report a case with infero-posterior type of ASD. Besides a review of literature, the clinical and hemodynamic studies, surgical correction as well as the postoperative results will be discussed.…”