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Across 1. pertaining to the heart 5. agent to prevent or delay blood clots 8. surgical excision of blood clot 9. decreased blood flow to a body part 12. acute infection caused by Epstein-Barr virus 13. irregular, random contraction of heart fibers 14. pertaining to the cerebrum 16. plastic or restorative surgery on a valve 19. enlargement of the spleen 21. bursting forth of blood 22. small arteries 23. muscular layer of heart 24. brain damage from interruption of blood supply 25. tumor of thymus gland

Down 2. enlarged heart 3. accumulation of fatty substances in walls of arteries 4. layer lining heart and heart valves 6. tumor of lymphatic vessels 7. wall or partition dividing body space or cavity 10. low oxygen content 11. endovascular procedure reopening narrowed blood vessels 15. higher than normal blood pressure 17. dilation of a vessel caused by weakness 18. Fibrous sac enclosing heart 20. irregularity or loss of rhythm of heartbeat