What is the main basis for diagnosing early pulmonary heart disease?

The doctor will determine whether the patient is cor pulmonale according to the patient's medical history and clinical manifestations. If the patient has a long-term smoking history, chronic obstructive pulmonary emphysema, and examination results of pulmonary artery protrusion and right lower pulmonary artery dilation, the probability of suffering from cor pulmonale is relatively high.