title: Author's response to a letter to the editor.
authors: Division of Cardiology, Clinical Cardiac Electrophysiology Section, Drexel University College of Medicine, USA. Electronic address: John.Fontaine@Drexelmed.edu.
authors: John M
authors: JM
authors: Fontaine
mesh_terms: D058406:Cardiac Resynchronization Therapy / Q000379:methods*; D004567:Electrodes, Implanted; D005260:Female; D006333:Heart Failure / Q000401:mortality* / Q000628:therapy*; D006801:Humans; D008297:Male