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Across 1. dilation of a vessel caused by weakness 5. bursting forth of blood 9. small arteries 10. brain damage from interruption of blood supply 11. low oxygen content 12. decreased blood flow to a body part 13. plastic or restorative surgery on a valve 17. surgical excision of blood clot 19. acute infection caused by Epstein-Barr virus 20. irregularity or loss of rhythm of heartbeat 21. tumor of lymphatic vessels 22. muscular layer of heart 23. tumor of thymus gland 24. accumulation of fatty substances in walls of arteries 25. wall or partition dividing body space or cavity

Down 2. enlargement of the spleen 3. enlarged heart 4. layer lining heart and heart valves 6. higher than normal blood pressure 7. pertaining to the heart 8. pertaining to the cerebrum 14. agent to prevent or delay blood clots 15. irregular, random contraction of heart fibers 16. Fibrous sac enclosing heart 18. endovascular procedure reopening narrowed blood vessels