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Automated External Defibrillator (AED):
a medical device that measures the electrical activity of an individual’s heart, analyzes the heart rhythm, and if necessary shocks the patient’s heart back to a normal rhythm.
a change in the rhythm of the heartbeat, often called an irregular heartbeat. The heart can beat too fast, too slow, too irregularly, or contract prematurely.
This is the absence of a heartbeat, also known as a flatline.
Biphasic Energy: a waveform of energy where the electrical current (shock) flows from one electrode to the other electrode and back again.
Cardiopulmonary Resuscitation (CPR):
a procedure performed following cardiac arrest that is designed to restore normal heart and breathing functions. This includes clearing the victim’s airway, mouth-to-mouth artificial respiration and external heart massage through pressure exerted on the chest.
a treatment for irregular heart activity that uses an electronic device to administer a shock and restore the heart’s natural rhythm.
also known as a “pad”, is an electrical conductor placed on the bare chest through which electricity flows to the heart.
a test that measures and records a patient’s heart rhythm, the electrical activity of their heart, through the use of electrodes placed on the upper body.
energy in a defibrillator is expressed in joules. A joule is the unit of work associated with one amp of current passed through one ohm of resistance for one second.
is resistance to the flow of energy. The amount of impedance in a victim correlates with their body mass, body temperature and the quality of contact of the pads or paddles.
a wire that connects the defibrillator to the electrodes and is used for EKG/ECG readings.
a waveform energy where the electrical current is deliveredthrough a single path, from one electrode to the other electrode.
Myocardial infarction (MI):
also known as a heart attack. This occurs when blood flow to a part of the heart is blocked and muscle affected is either damaged or dies. A heart attack cannot be treated with the use of an AED.
the normal beating of a heart.
Sudden Cardiac Arrest (SCA):
this occurs when the heart immediately and unexpectedly stops beating. The only way to treat SCA is use of an AED.