title: The ECG "Lead I sign" in cardiac disease--an indicator of go-existing obstructive pulmonary disease.
authors.forename: J L
authors.initials: JL
authors.lastname: Da Costa
mesh_terms: D004562:Electrocardiography; D004646:Emphysema / Q000150:complications / Q000175:diagnosis*; D006331:Heart Diseases / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications / Q000175:diagnosis*; D012680:Sensitivity and Specificity