title: Creation of atrial septal defect through left thoracotomy.
mesh_terms: D000818:Animals; D004285:Dogs; D005112:Extracorporeal Circulation; D006325:Heart Atria / Q000601:surgery*; D006346:Heart Septum / Q000601:surgery*; D008722:Methods; D010166:Palliative Care; D013525:Surgical Instruments; D013536:Suture Techniques; D014188:Transposition of Great Vessels / Q000601:surgery*