automated internal defibrillator

Also called an implantable cardioverter defibrillator, an automated internal defibrillator is a small battery-powered device that treats life-threatening irregular heartbeats (arrhythmias), including those that cause sudden cardiac arrest. The device is implanted under the skin of the chest with wires that connect to the heart. If the device detects an irregular heart rhythm, it sends electrical impulses to restore a normal rhythm.

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