1 — Left atrium; 2 — Right superior pulmonary vein; Right inferior pulmonary vein; Left superior pulmonary vein; Left inferior pulmonary vein; 3 — Bronchial veins; 4 — Accessory hemi-azygos vein; Superior hemi-azygos vein; 5 — Azygos vein; 6 — Superior vena cava; 7 — Right atrium
