[Chronic pulmonary heart disease and its risk factors among a worker population in Teheran].

Because of the high frequency of chronic cor pulmonale in workers admitted to the cardiology department of the Khazaneh Hospital in Teheran, we studied the clinical aspect and the risk factors of this disease in 66 male patients. The average age of patients was 56.1 years and they often had a long history of bronchitis isolated or associated with emphysema. The ECG analysis showed that most abnormalities were localized on the QRST wave. Tobacco and a polluted working environment were the factors most frequently met in our patients. The opium habit probably acted as a risk factor for chronic bronchopneumopathy, but further studies are necessary to ascertain the fact.