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An ICD is a battery-powered device placed under the skin that keeps track of your heart rate. Thin wires connect the ICD to your heart. If an abnormal heart rhythm is detected the device will deliver an electric shock to restore a normal heartbeat if your heart is beating chaotically and much too fast Studies have shown ICDs to have a role in preventing cardiac arrest in high-risk patients who haven't had, but are at risk for, life-threatening ventricular arrhythmias.
Your doctor may recommend an ICD if you are at the risk of a life-threatening ventricular arrhythmia because of having:
A battery-powered pulse generator is implanted in a pouch under the skin of the chest or abdomen, often just below the collarbone. The generator is about the size of a pocket watch. Wires or leads run from the pulse generator to positions on the surface of or inside the heart and can be installed through blood vessels, eliminating the need for open-chest surgery.
It knows when the heartbeat is not normal and tries to return the heartbeat to normal.
If your ICD has a pacemaker feature when your heartbeat is too slow, it works as a pacemaker and sends tiny electric signals to your heart. When your heartbeat is too fast or chaotic, it gives defibrillation shocks to stop the abnormal rhythm.
ICDs have been very useful in preventing sudden heath in patients with known, sustained ventricular tachycardia or fibrillation.
Results: Studies have shown that they may have a role in preventing cardiac arrest in high-risk patients who haven't had, but are at risk for, life-threatening ventricular arrhythmias.
Ventricular tachycardia- It is a type of regular, fast heart rate that arises from improper electrical activity in the ventricles of the heart. Although a few seconds may not result in problems, longer periods are dangerous.
Fibrillation: It is a quivering or irregular heartbeat (arrhythmia) that can lead to blood clots, stroke, heart failure and other heart-related complications
Ventricular arrhythmias: These are abnormal heartbeats that originate in your lower heart chambers, called ventricles. These types of arrhythmias cause your heart to beat too fast, which prevents oxygen-rich blood from circulating to the brain and body and may result in cardiac arrest.
Brugada syndrome: It is a condition that causes a disruption of the heart's normal rhythm.Learn Less
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