13. how does a automated external defibrillator work?
a. it sends a shock to the heart
b. it simulates the heartbeat through chest compressions.
c. it alters irregular heartbeats with vibrations.
d. it takes the vitals of a person for the paramedics
14. where should you apply aed pads?
a. on top of clothes in the center of the chest
b. on top of clothes on the upper right shoulder and lower left ribs.
c. on bare skin in center of the chest
d. on bare skin on the upper right shoulder and lower left ribs.
15.hands-only cpr is better than
a. no cpr
b. conventional cpr
c. an automated external defibrillator (aed)

AED´s or Automated External Defibrilators are devices that were created to be used by non-medical people when someone suffers a heart arrest. These devices are generally very easy to use, but it is important to understand the instructions, as they are still devices that produce electrical shocks in order to reanimate the heart during CPR. As such, the answers to your questions, with a small explanation, would be thus:

13. How does an AED work? The answer would be, A: It sends shocks to the heart. A Heart arrest, or an arrythmia, are two conditions in which either all electrical conduction stops, or it is so irregular, that the muscles become unable to respond, and thus do not contract as they should. The AED re-starts  the heart´s electrical conduction system by shocking it.

14. Where should you apply AED pads? The best answer here is, D: On bare skin on the upper right shoulder and lower left ribs. The reason is that this is the correct pathway of conduction of electrical pulses in the heart. Clothing becomes an impediment, and a danger, for a patient, especially if it is flamable, as the AED produces electrical shocks to re-start the heart. And the placing of the pads is to direct the current in the right pathway.

15. Hands-only CPR is better than... The best answer would be, A: No CPR. CPR. CPR, or cardiopulmonary resucitation, is a life-saving maneuver and when it can be performed, it must be. If a person feels insecure about conventional CPR, due to the mouth-to-mouth resucitation part, it is much better to at least initiate hands-only, as the pumping of the heart by hand will allow the person to survive, at least, until trained personnel arrives.

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