These generally include pulmonary function tests ; blood tests to exclude HIV , autoimmune diseases , and liver disease ; electrocardiography ( ECG ) ; arterial blood gas measurements ; X-rays of the chest ( followed by high-resolution CT scanning if interstitial lung disease is suspected ) ; and ventilation-perfusion or V\/Q scanning to exclude chronic thromboembolic pulmonary hypertension .
These generally include pulmonary function tests , blood tests , electrocardiography ( ECG ) , arterial blood gas measurements , X-rays of the chest ( followed by high-resolution CT scanning if interstitial lung disease is suspected ) , and ventilation-perfusion or V\/Q scanning to exclude chronic thromboembolic pulmonary hypertension .