Understanding how AEDs work


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Understanding how AEDs work

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Understanding how AEDs work

  1. 1. AED Defibrillators: Understanding How AEDs Work<br />
  2. 2. The human heart beat is powered by chemical impulses produced by special cells called pacemaker cells. <br />
  3. 3. These cells are often affected by external stimuli-- medication, stress, and physical activity, just a few things that change body chemistry; altering chemical impulses, increasing or decrease heartbeat. <br />
  4. 4. One of the most well-known and often misunderstood external heart stimuli is defibrillation. <br />
  5. 5. Defibrillation is the administration of a jolt of electricity to the heart which depolarizes the heart muscle and allows the heart's natural pacemaker to potentially reset and continue beating. <br />
  6. 6. Defibrillation is performed by devices called defibrillators, which vary in design and ability. <br />
  7. 7. Currently, the familiar TV and movie trope of defibrillator paddles being used on flat-lining patients is outdated. <br />
  8. 8. More commonly, defibrillation will occur via the prophalayctic nodes, which are attached to the chest of the patient and also used to monitor heart rate.<br />
  9. 9. These nodes deliver shocks when a shockable heart rhythm occurs. <br />
  10. 10. Unlike TV shows, a shocked patient does not convulse, usually there is only a small amount of muscle contraction throughout the body.<br />
  11. 11. Also, unlike media portrayals, a flat line is usually an ‘unshockable’ rhythm. <br />
  12. 12. Ventricular fibrillation is a ‘shockable’ heart rhythm and is when the ventricles quiver rather than work in a pattern. <br />
  13. 13. Ventricular tachycardia, another shockable rythmn, is an extremely fast rhythm in which there is a loss of pulse. <br />
  14. 14. Certain types of cardiac arrhythmias may not be shockable depending on severity and rhythm type. <br />
  15. 15. Defibrillator devices in hospitals are usually not completely automatic, but are very similar to the completely automatic AEDs by Cardiac Science, Zoll, Phillips HeartStart, and Samaritan. <br />
  16. 16. The Cardiac Science Powerheart G3 Portable AED Defibrillator is designed to be easy to use in an emergency cardiac arrest situation. <br />
  17. 17. The Powerheart Portable Automatic External Defibrillator features a text screen, convenient for noisy and chaotic environments, which runs in tandem with the voice prompts. <br />
  18. 18. The device displays the patient's heart rate, the waveform, number of shocks delivered, and the elapsed time. <br />
  19. 19. The Powerheart Defibrillator features built in automatic synchronization and pacemaker pulse detection.<br />
  20. 20. The Zoll AED Plus is a unique unit in that it is completely automatic, but also it is the only full-rescue AED, walking the user through the full “Chain of Survival” by supporting CPR. <br />
  21. 21. Not only does the Zoll AED Plus track a shockable heartbeat, it also tracks chest compressions by the rescuer and advises on pace and compression strength. <br />
  22. 22. The Zoll AED Plus provides Real CPR help, providing visual and audio feedback and instructions. <br />
  23. 23. The HeartStart OnSite AED likewise provides audible commands when in use, and walks the rescuer through potential defibrillation, if a shockable rythmn is detected. <br />
  24. 24. The Samaritan PAD Public Access Defibrillator AED is especially designed for public access use. <br />
  25. 25. All of these AEDs use verbal and visual prompts to guide the rescuer.<br />
  26. 26. The AEDs let the rescuer know when to touch and when not to touch the patient.<br />
  27. 27. If a shock is required, there will be a visual clue.<br />