title: Cor pulmonale in cystic fibrosis.
abstract: A VCG and an orthogonal ECG were done on 66 ambulatory patients with cystic fibrosis. Arteriolized pO2, FEV1/VC and MBC were related to electrocardiographic measurements. In this group of adolescent and young adult patients the most helpful electrocardiographic sign of cor pulmonale is a low voltage representing the left ventricle. The four best indicators from the cardiogram are (1) Rx less than .8 mv; (2) Rx/Sx less than 4.0; (3) Tx less than .4 mv; and (4) MLVF + MLVH less than 2.5 mv. If more than one indicator is found cor pulmonale is likely present. Increased voltage over the right ventricle does not identify patients with cor pulmonale.
mesh_terms: D000293:Adolescent; D000328:Adult; D001794:Blood Pressure; D002648:Child; D002675:Child, Preschool; D003550:Cystic Fibrosis / Q000150:complications / Q000503:physiopathology*; D004562:Electrocardiography; D005541:Forced Expiratory Volume; D006801:Humans; D010100:Oxygen / Q000097:blood; D011651:Pulmonary Artery / Q000503:physiopathology; D011660:Pulmonary Heart Disease / Q000209:etiology / Q000503:physiopathology*; D012119:Respiration; D014672:Vectorcardiography; D014797:Vital Capacity
chemical_list: D010100:Oxygen