title: A portable electrocardiographic screening device. An evaluation.
mesh_terms: D000328:Adult; D002037:Bundle-Branch Block / Q000175:diagnosis; D003327:Coronary Disease / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000295:instrumentation*; D004582:Electronics, Medical; D005189:False Positive Reactions; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009787:Occupational Medicine; D013997:Time Factors