Standard 12 Lead ECG System

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Across
  1. 4. Represents time between ventricular depolarization and repolarization
  2. 7. Primary electrolytes responsible for electrical difference across the RMP include Sodium, calcium and ________
  3. 10. Is usally flat and not seen
  4. 13. Under ________ conditions, tracings have very predictable directions, durations, and amplitudes
  5. 15. Trigger for myocardial contraction
  6. 16. state When the heart is relaxed is said to me in a _______ state
  7. 17. Ability of cardiac muscle fibers to shorten and contract in response to electrical stimulus
  8. 19. _______ leads which have two electrodes one is negative and one is positive
  9. 20. Node that fires between 60-100 times/minute
  10. 21. is the electrode placed at between the 4th and 5th intercostal space on the right of the sternum
  11. 22. specialized pacemaker cells located in the SA node
  12. 23. Represents ventricular repolarization, rest, and recovery
  13. 26. The number of small squares that equal 3 seconds
Down
  1. 1. The ________ square on the ECG paper is equal to 0.20 second
  2. 2. Period of time when cells cannot respond to stimulus
  3. 3. A standard 12 lead ECG has _______ electrodes
  4. 5. How many precordial (chest) leads
  5. 6. The ________ square on the ECG paper is equal to 0.04 sec
  6. 8. How many limb electrodes are used
  7. 9. The QRS complex represents the ___________ depolarization
  8. 11. Normal cycle of electrical activity in heart begins with _______ depolarization
  9. 12. Ability of heart cells to transmit electrical current from cell to cell throughout entire conductive system
  10. 14. Period of time when cells are ready to respond to stimulus in normal fasion
  11. 18. _______ is plotted on the horizontal line of the ECG paper
  12. 22. _________ is plotted on the vertical line of the ECG paper
  13. 24. Graphic representation of electrical activity of heart’s conductive system recorded over period of time
  14. 25. Potentials Heart contracts by generating and propagating _________