The Heart and ECG

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Across
  1. 2. description of heart rate measured externally
  2. 3. squeezing of heart muscle causing a pump
  3. 8. image 2
  4. 9. The quivering of the heart's chambers
  5. 10. section of the ECG corresponding to ventricular depolarization
  6. 11. the electrical change causing the heart muscle to contract
  7. 13. special feature of heart muscle allowing it to contract without stimulus
  8. 14. one of the large heart chambers
Down
  1. 1. the muscular wall between the ventricles
  2. 4. image 3
  3. 5. image 1
  4. 6. device used to shock the heart back into rhythm
  5. 7. one of the small heart chambers
  6. 12. the piece of tissue that causes the heart to beat