Appropriate Implantable Cardioverter-Defibrillator Therapy in Patients with Ventricular Arrhythmia of Unclear Cause in Secondary Prevention of Sudden Cardiac Death.

Furthermore, ICD therapies seemed to occur more frequently in patients in whom an alternative diagnosis was found during follow-up than in those for whom this was not the case, with a nearly significant difference between the groups [ 9 ].

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