Jiménez-López, JesúsVallés Gras, ErmengolAlcalde Rodríguez, OscarBenito Villabriga, BegoñaCabrera Gómez, SandraMartí-Almor, Julio2016-12-052016-12-052016Jiménez-López J, Vallès E, Alcalde O, Benito B, Cabrera S,Martí-Almor J. Not Enough QRS Shortening? Keep Calm and Add Another Lead. J Clin Case Rep 2016 6:789. doi:10.4172/2165-7920.10007892165-7920http://hdl.handle.net/10230/27688Cardiac resynchronization therapy (CRT) diminishes symptoms and reduces hospitalization and mortality in patients with heart failure, LV dysfunction and left bundle branch block. However, up to one third of patients do not respond to CRT. In that regard, few initial studies presenting multisite pacing have shown encouraging results, demonstrating both feasibility and safety in placing a second CS lead in >80% of patients intended, with further QRS shortening, which is the most powerful predictor of LV reverse remodelling.application/pdfeng© 2016 Jiménez-López J, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Cor -- Malalties -- TractamentInfart de miocardiFibril·lació auricularinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.4172/2165-7920.1000789info:eu-repo/semantics/openAccess