title: Normal ranges of modified axial lead system electrocardiogram parameters.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000703:Analog-Digital Conversion; D002648:Child; D002675:Child, Preschool; D003201:Computers; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013637:Tape Recording; D013997:Time Factors; D014672:Vectorcardiography