Across
- 4. heart rate less than 60 beats per minute
- 9. diagnostic test used to assess the electrical activity for diagnosing arrhythmias
- 10. hormone which causes increased heart rate and cardiac output
- 11. heart rate greater than 100 beats per minute
- 12. relaxation of heart muscle
- 13. largest heart chamber with thickest wall to pump blood out to entire body
Down
- 1. thickest layer of the heart / heart muscle
- 2. how cells in cardiac muscle are linked
- 3. heart's pacemaker where rate of 60-100 is set
- 5. keeps blood from flowing back into left ventricle
- 6. contraction of heart muscle
- 7. volume of blood pumped by each ventricle in a minute
- 8. valve located between right atrium and right ventricle