Clinical symptoms and signs are often non-specific or absent in early<unk> , with signs of right heart failure only in advanced disease. The main symptom of<unk>  is exertional breathlessness (shortness of breath during exertion such as exercise), which is unspecific and may often be attributed to other, more common, diseases by physicians. When present, the clinical symptoms of<unk>  may resemble those of acute PE, or of idiopathic pulmonary arterial hypertension (iPAH). Leg oedema (swelling) and haemoptysis (blood in mucus) occur more often in<unk> , while syncope (fainting) is more common in iPAH.
Chronic thromboembolic pulmonary hypertension
Pulmonary hypertension
Portopulmonary hypertension
Pulmonary venoocclusive disease
Absent pulmonary valve syndrome
Bilharzial cor pulmonale
Asthma
Lettuce big-vein disease