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Lung India Official publication of Indian Chest Society  
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ORIGINAL ARTICLE
Year : 2008  |  Volume : 25  |  Issue : 4  |  Page : 145-147

A study of correlation between transhilar diameter and P pulmonale in COPD patients


Department Pulmonary Medicine, Institute of Chest Diseases, Medical College, Calicut, India

Correspondence Address:
C Ravindran
Department of Pulmonary Medicine, Institute of Chest Diseases, Medical College, Calicut – 673 008, Kerala
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-2113.45278

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Background: Early diagnosis and therapy of Pulmonary hypertension in COPD patients may help in retardation of progression and amelioration of symptoms. This is an attempt to diagnose the disease from X-ray chest of COPD patients, so that invasive in­vestigations can be avoided. Objectives: (1) Measurement of transhilar diameter in Chest X-ray PA view of COPD patients and its importance in detection of pulmonary hyper­tension. (2) To study correlation between P pulmonale and transhilar diameter / hilar thoracic ratio. Design: Prospective Clinical study. Setting: Institute of Chest Diseases, Medical College, Calicut. Period of study: One year from September 2002 to August 2003. Materials and Methods: 100 patients admitted to Institute of Chest Diseases with COPD and ECG evidence of P pulmonale and/or RVH were included. Chest X-rays was taken and the following diameters were measured. Transhilar diameter, hilar thoracic ratio, width of descending branch of (Rt) pulmonary artery and cardiothoracic ratio. Conclu­sions: Chest X-ray can be used for identification of pulmonary hypertension in COPD patients. Positive correlation was seen between P pulmonale and hilar thoracic ratio. Posi­tive correlation was also seen between P pulmonale and other parameters like smoking status, symptom duration, ECG evidence of RVH and negative correlation was seen with % predicted FEV1.


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