Epidemiology of bundle branch block in Puerto Rico.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002037:Bundle-Branch Block / Q000175:diagnosis / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011647:Puerto Rico; D012189:Retrospective Studies; D012737:Sex Factors