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Shocks as predictors of survival in patients with implantable cardioverter-defibrillators

Antonio Pacifico, MD, FACC^*, Laura L. Ferlic, MS^* , F.élix R. Cedillo-Salazar, MD^* , Nadim Nasir, Jr, MD, FACC^* , Timothy K. Doyle, MD, FACC^* and Philip D. Henry, MD, FACC^*

^* Texas Arrhythmia Institute, Houston, Texas, USA
Baylor College of Medicine, Houston, Texas, USA

View larger version (18K): [in a new window]   Figure 1 Kaplan-Meier survival curves for patient groups receiving different types of ICD shock therapies. Top panel: unadjusted for LVEF. Lower panels: adjusted for categorical LVEF. In this and in subsequent figures, NS, SS, MS and (SS, MS) indicate no shock, single shock, multiple shocks and any shock as defined in Methods section.

View larger version (21K): [in a new window]   Figure 2 Kaplan-Meier survival probability stratified according to LVEF: comparison of any versus no shock. Upper panel: LVEF <35%. Lower panel: LVEF 35%. Abbreviations as in Figure 1 legend.

View larger version (20K): [in a new window]   Figure 3 Kaplan-Meier survival probability stratified according to LVEF: comparison of multiple versus single shocks. Upper panel: LVEF <35%. Lower panel: LVEF 35%. Abbreviations as in Figure 1 legend.