Addition of a Left Ventricular Lead to Conventional Pacing Systems in Patients with Congestive Heart Failure: Feasibility, Safety, and Early Results in 60 Consecutive Patients. - Baker, Cindy M.; Christopher, Thomas J.; Smith, Paige F.; Langberg, Jonathan J.; Delurgios, David B.; Leon, Angel R. (Pacing & Clinical Electrophysiology, 2002)