Chronic pulmonary emboli are mainly a consequence of incomplete resolution of acute pulmonary thromboembolism. Clinically symptoms and signs may be preceded by Acute PE for more than two weeks

Pharmacological

Long-term oral anticoagulation

• Warfarin 2–10mg once a day orally

Maintain INR 2.0–3.0

Referral: All cases suspected of pulmonary embolus should be referred to a high level of care