1. Definition: Chronic pulmonary thromboembolism occurs when blood clots in the lungs do not dissolve completely, causing long-term blockage in lung arteries.

2. Causes: Typically begins with a blood clot from the legs or other body parts traveling to the lungs (pulmonary embolism).

3. Symptoms: Include shortness of breath, fatigue, chest pain, and leg swelling.

4. Complications: Can lead to pulmonary hypertension and heart failure if untreated.

5. Diagnosis: Involves imaging tests like CT scans or ventilation-perfusion scans.

6. Treatment: May include blood thinners, medications to reduce lung artery pressure, or surgery to remove clots.

Consult a healthcare provider for evaluation if symptoms or risk factors are present.