title: Recent progress in cardiac pacing.
mesh_terms: D004567:Electrodes, Implanted; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D009119:Muscle Contraction; D010138:Pacemaker, Artificial; D010369:Pectoralis Muscles / Q000502:physiology*; D005082:Physical Exertion