title: The relationship of the P wave axis to pulmonary function in an ambulatory, working population.
mesh_terms: D000328:Adult; D000367:Age Factors; D002675:Child, Preschool; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009787:Occupational Medicine; D012119:Respiration; D013147:Spirometry; D014797:Vital Capacity