Implantable cardioverter defibrillator, Biology

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Patients with aborted sudden death, hemodynamically unstable ventricular arrhythmias, and unexplained cardiogenic syncope are at high risk for fatal ventricular arrhythmias. If these patients have a reasonable life expectancy and stable, non-refractory heart failure, an implantable defibrillator is the approach of choice (in conjunction with beta blockade). The constraining factor is the high cost involved.

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