Letter to the Editor
                                    Evaluating patients for CRT, what is relevant:  identifying responders or estimating the amount of potential response?
                                    
                                    
                                                                                                                                    1ICREA - Universitat Pompeu Fabra, Barcelona, Spain, KU, Leuven-Belgium
2Hospital Clínic, IDIBAPS, University of Barcelona, Barcelona-Spain
                                                                                                                        
                                    
                                2Hospital Clínic, IDIBAPS, University of Barcelona, Barcelona-Spain