Defibrillators
Defibrillators
Defibrillators (/dɪˈfɪbrɪleɪtər/) are medical devices used to restore a normal heartbeat by sending an electric pulse or shock to the heart. They are used to prevent or correct an arrhythmia, a heartbeat that is uneven or that is too slow or too fast. Defibrillators can also restore the heart's beating if the heart suddenly stops.
Etymology
The term "defibrillator" is derived from the Latin de- meaning "from" or "off", and fibrilla meaning "small fiber". The term was first used in the early 20th century, referring to the device's ability to remove fibrillation, or rapid, irregular contractions of the heart muscle fibers.
Types of Defibrillators
There are several types of defibrillators, including:
- Automated External Defibrillators (AED) - These are found in places where large numbers of people gather. They are designed to be used by nonmedical personnel, such as police, fire service personnel, lifeguards, teachers, and even untrained bystanders.
- Implantable Cardioverter Defibrillators (ICD) - These are implanted in the patient's body and connected to the heart. They automatically monitor the heartbeat, detect irregular heart rhythm, and deliver a shock to restore normal rhythm if necessary.
- Wearable Cardioverter Defibrillators (WCD) - These are worn by patients who are at risk for sudden cardiac arrest but who cannot have an ICD implanted.
- Advanced Life Support (ALS) Defibrillators - These are used by healthcare professionals in hospitals and ambulances. They can monitor the patient's heart rhythm, show it on a screen, and deliver a shock at the right moment.
Related Terms
- Arrhythmia - A condition in which the heart beats with an irregular or abnormal rhythm.
- Cardiac Arrest - A sudden loss of blood flow resulting from the failure of the heart to effectively pump.
- Cardioversion - A medical procedure that restores a normal heart rhythm in people with certain types of abnormal heartbeats.
- Pacemaker - A small device that's placed in the chest or abdomen to help control abnormal heart rhythms.
External links
- Medical encyclopedia article on Defibrillators
- Wikipedia's article - Defibrillators
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