1. They freeze the damaged muscle which is near the coronary sinus . 2. When introduced into the coronary sinus , it is called retrograde cardioplegia. 3. The coronary sinus empties into the right atrium. 4. The coronary veins all empty into the coronary sinus which empties into the right atrium. 5. The coronary sinus valve is also known as the " Thebesian valve ". 6. From head to tail, these are the atrium, the sinoatrial node and the coronary sinus . 7. The bottom evolves into : the inferior valve of the vena cava and the coronary sinus valve. 8. The anterior cardiac veins do not drain into the coronary sinus but drain directly into the right atrium. 9. It may drain to the coronary sinus , right atrium, middle cardiac vein, or be absent. 10. The concentration of converging conduction tracts near the coronary sinus results in considerable automaticity activity originating in that area.
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