Across
- 3. abnormal heart rhythm
- 4. relaxation phase of the heartbeat
- 6. electronic apparatus implanted in the chest
- 10. thin-walled vessel
- 11. treats arrhythmias
- 12. closes an opening so blood flows in one direction
- 14. bluish discoloration of the skin
- 15. upper chamber of the heart
Down
- 1. largest type of blood vessel
- 2. contraction phase of the heartbeat
- 5. cholesterol drug
- 7. chest pain resulting from myocardial ischemia
- 8. innermost lining of blood vessels
- 9. wall dividing a cavity
- 13. area of dead tissue