standard echocardiographic parameters were not predictive of reverse LV remodeling. Conclusions: ECG and EP parameters, evaluating electrical asynchrony at implantation, can predict LV functional recovery and reverse remodeling after CRT. Particularly the use of Bp/RVp index can improve CRT results, by identifying effective pacing sites. 467Cardiac resynchronization in long term follow up: analysis of clinical response predictors

Although transvenous access for atrioventricular pacemaker implantation is considered the state of the art, clinical and technical situations that may impede transvenous leads implantation have become increasingly common, making it necessary the proposal of new surgical approaches. The aim of this study was to assess the effectiveness of bipolar epicardial atrial pacing using an active fixation bipolar endocardial lead implanted on the atrial surface in an experimental model.

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