Scientific Letter
                                    Demonstrating a rare anatomical variation of cardiovascular system by using a new technique
                                    
                                    
                                                                                                                                    1Department of Pediatric Cardiology, Faculty of Medicine, Gazi University; Ankara-Turkey
2BTech Innovation; Ankara-Turkey
                                                                                                                        
                                    
                                2BTech Innovation; Ankara-Turkey
                                                                            Keywords: congenital heart, 3D-PDF, persistant left superior vena cava