Abstract
CTEPH is the only cause of severe pulmonary hypertension which is potentially curable without the need to resort to lung transplantation. Pulmonary endarterectomy (PEA) is the surgical procedure which removes the obstructing thromboembolic material, resulting in significant improvements (and in many cases normalisation) in right ventricular haemodynamics and function. This procedure requires a high degree of anaesthetic and surgical skill, coupled with assiduous preoperative evaluation of potential patients. Surgery is generally considered only in patients with proximal chronic thromboembolic disease as assessed by radiological investigations.

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