Survivors of ventricular tachyarrhythmias due to a transient or reversible disorder have a high recurrence rate of lethal cardiac events

Abstract

Objectives: The recurrence rate of lethal cardiac events after the survival of a primary cardiac arrest in patients not having received an implantable cardioverter defibrillator (ICD) is investigated. Background: According to current guidelines, only a small percentage of patients after successful cardiopulmonary resuscitation due to an underlying cardiac problem are eligible for the implantation of an ICD. Methods: For retrospective analysis, we used a data registry of patients admitted to an emergency department after cardiac arrest. Patients who had a primary cardiac cause for their cardiac arrest and who did not die within the first month after successful restoration of spontaneous circulation were selected. Results: From 1246 patients, 360 met the inclusion criteria. A second lethal cardiac event occurred in 94 (26%). Of those 94 patients, 57 (61%) had good neurological function before their second cardiac arrest. Of the survivors with good neurological function, 47 (82%) did not have an ICD or a cardiac transplant. Another cardiac arrest due to a primary cardiac event occurred in 34 (72%) of these patients. Conclusions: Cardiac arrest survivors without an apparent indication for an ICD have a high risk of suffering from a re-arrest of cardiac origin.