Abstract 18183: Short-term Impact of Defibrillation Testing on Heart Failure Admission

Abstract

Introduction: SIMPLE trial showed that defibrillation testing (DT) is safe but does not improve shock efficacy or mortality. However, impact of DT on heart failure (HF) admission at 30 days is unclear. Objectives: The aim of this study was to compare mortality and HF admission of ICD recipients who underwent DT (DT+) compared with those who did not (DT-). Methods: In this retrospective study, we analyzed consecutive patients who received an ICD ( new implant or generator change ) with DT+ and DT- between January 2008 and May 2014 from our ICD registry. Primary endpoints were death ( 30 days and 1 year ) and HF admission ( 30 days) . Results: Of the 501 patients, 311 patients (62,1%) were in DT+ group vs 190 (37,9%) were in DT- group. The mean ages in DT+ and DT- were 66 ± 10 and 70 ± 10 respectively (p<0.0001). DT- group had more generator change than DT+ group ( 61,1% versus 30,9%, p < 0.0001). Other demographic features were not significantly different between two groups (Table 1). No significant difference in mortality was found between two groups at 30 days and 1 year. HF admission at 30 days was significantly higher in DT+ group than in DT- group ( 17,4 % versus 4,7%, p < 0.0001) (Table 2). Conclusion: No short-term and long-term mortality were associated with DT, but DT was associated with increased HF admission at 30 days. Future prospective studies are needed to prove this association.