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Implantable defibrillator event rates in patients with idiopathic dilated cardiomyopathy, nonsustained ventricular tachycardia on Holter and a left ventricular ejection fraction below 30%

Wolfram Grimm, MD^*,*, J.ürgen Hoffmann, MD^*, Hans-Helge Müller, PhD and Bernhard Maisch, MD^*

^* Department of Cardiology, Hospital of the Philipps-University of Marburg, Marburg, Germany
Medical Center for Methodology and Health Research, Institute for Medical Biometry and Epidemiology, Philipps-University Marburg, Marburg, Germany

View larger version (79K): [in a new window]   Figure 1 Stored electrogram (25 mm/s) of spontaneous ventricular tachycardia terminated by a 31 J shock in a patient with idiopathic dilated cardiomyopathy and prophylactic defibrillator implantation. VF = ventricular fibrillation.

View larger version (39K): [in a new window]   Figure 2 Kaplan-Meier curves showing the event-free survival rates for: (A) appropriate implantable cardioverter defibrillator (ICD) interventions for any ventricular tachycardia (VT) or ventricular fibrillation (VF) as documented by stored electrograms; (B) appropriate ICD shocks exclusively for rapid VT or VF with a mean rate 240 beats/min; (C) transplant-free survival.