Pulmonary hypertension is itself a very complex disease, with many causative factors in clinical practice. In the early stages, patients may only exhibit symptoms such as shortness of breath after activity, difficulty breathing, and overall fatigue. However, as the condition gradually worsens, patients may experience chest tightness, rapid breathing, and even chest pain, fainting, or dizziness. If the patient also has right heart dysfunction, they may experience symptoms like swelling of the lower limbs, as well as diarrhea and abdominal distension. Therefore, if pulmonary hypertension patients are definitively diagnosed and do not receive timely appropriate treatment, the accompanying clinical symptoms may rapidly worsen. The patient's life may be at risk due to severe symptoms such as hypoxia or fainting.