title: Clinical evaluation of new pulse generator with narrow pulse width for conservation of battery energy.
mesh_terms: D000200:Action Potentials; D005500:Follow-Up Studies; D006321:Heart / Q000503:physiopathology; D006327:Heart Block / Q000503:physiopathology; D006801:Humans; D010138:Pacemaker, Artificial; D010369:Pectoralis Muscles / Q000502:physiology