There are two main types of defibrillators: Implanted Cardioverter Defibrillators (ICDs) and Wearable Cardioverter Defibrillators (WCDs).
Here's a breakdown of each type:
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Implanted Cardioverter Defibrillators (ICDs): These are small devices that are surgically implanted in the chest. They continuously monitor the heart's rhythm. If the ICD detects a dangerously fast heart rate (ventricular tachycardia) or a chaotic rhythm (ventricular fibrillation), it can deliver an electrical shock to restore a normal heartbeat.
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Wearable Cardioverter Defibrillators (WCDs): These are external defibrillators, typically in the form of a vest worn under clothing. A WCD also monitors the heart's rhythm and delivers a shock if a life-threatening arrhythmia is detected. It is often used for patients who are at risk of sudden cardiac arrest but are not yet candidates for a permanent ICD. A WCD usually has a rechargeable battery.