title: [A study on sex and age differences of electrocardiographic U waves in normal Japanese (author's transl)].
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D014672:Vectorcardiography