Across
- 4. Episodes of abnormally fast heart rate at rest
- 6. Main pathway of interatrial conduction
- 9. Acts as the normal pacemaker of the heart
- 11. Helps set the pace of the heart's contractions
- 12. Helps with diagnosing arrhythmias, coronary heart disease, and heart attacks
- 13. Cells return to a negative charged state
Down
- 1. Conduct electrical impulses that allow contraction of the cardiac muscle
- 2. Heart beats more slowly than normal
- 3. Genetics, high blood pressure, sleep apnea
- 5. Controls the heartbeat
- 7. Heart beats irregularly and faster than normal
- 8. Controls the heart rate
- 10. Cells of the heart become less negative and contract