title: Amplitude--frequency characteristics of myopotentials and endocardial potentials as seen by a pacemaker system.
mesh_terms: D000200:Action Potentials; D000328:Adult; D000368:Aged; D002986:Clinical Trials as Topic; D003201:Computers; D004594:Electrophysiology / Q000295:instrumentation / Q000379:methods; D004699:Endocardium / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000502:physiology*; D010138:Pacemaker, Artificial