title: QRS voltage criteria for posterior unipolar chest leads in a normal population.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016275:Atrial Function; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014672:Vectorcardiography; D016276:Ventricular Function