Pulmonary Endarterectomy Abroad Pulmonary Endarterectomy Pulmonary Endarterectomy (PEA, also known as PTE) is a surgical operation in which the blood vessels of the lungs are cleared of clot and scar material. Although this sounds simple, it is actually technically very difficult to get access to the arteries of the lungs, and the procedure itself is a major undertaking. For this reason it is necessary to ensure that patients who might potentially benefit from this operation are thorough