title: Reduction of 60 hertz interference in EKG monitoring in radiographic special procedure rooms.
mesh_terms: D000669:Amplifiers, Electronic; D004562:Electrocardiography; D004582:Electronics, Medical / Q000295:instrumentation*; D005374:Filtration / Q000295:instrumentation; D008991:Monitoring, Physiologic; D013679:Technology, Radiologic / Q000295:instrumentation*