Assessment of Ventricular Arrhythmia Risk After CRT-D Replacement for Patients With Primary Prevention Indication

The objective of this study is to describe, in a population of patients who had a primary prevention ICD indication at first implantation of a CRT-D, the relevance defibrillator back-up after the replacement of the first CRT-D. For that, the rate of patients with at least one sustained VTA detected by the CRT-D or a conventional surface ECG will be assessed after the device replacement. Furthermore, the association between the baseline characteristics of the CRT-D population after replacement and the risk of subsequent VTA will be explored after a minimum of two years FU.