1 — Inferior vena cava; 2 — Opening of coronary sinus; 3 — Limbus fossae ovalis; Border of oval fossa; 4 — Foramen ovale; 5 — Right superior pulmonary vein; Right inferior pulmonary vein; 6 — Superior vena cava; 7 — Right auricle; 8 — Interatrial septum; 9 — Tricuspid valve; Right
atrioventricular valve; 10 — Right atrioventricular orifice
