Risks. The most dangerous arrhythmias are ventricular fibrillation and ventricular tachycardia, which may cause cardiac arrest and cessation of blood flow. Implantable cardioverter-defibrillators (ICDs are the most effective treatment to significantly improve survival of these patients.
The procedure typically takes between one and three hours. Afterward, you'll stay in the hospital for at least 24 hours for recovery and monitoring. You should feel fully recovered within four to six weeks. A doctor can also implant an ICD surgically under general anesthesia.
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