The clinical course of most @entity1 with @entity1151 is one of gradual resolution with re-establishment of flow in the pulmonary arteries. In a small but definite group of @entity1 , the emboli do not resolve and a state of @entity1151 ensues. The primary @entity49 may persist, and in some instances may be unrecognized. Such @entity1 experience recurrent @entity999 which may ultimately occlude a large part of the pulmonary arterial circulation with development of severe @entity1576 . Six @entity1 with this syndrome are described, and in each there was a history of @entity1353 , cyanoiss, and exercise intolerance associated with a low arterial @entity4095 , right @entity123 , and @entity120 . Pulmonary scans and arteriograms demonstrated that more than half of the major pulmonary arteries were occluded and, in addition, smaller vessels were also obstructed. Pulmonary embolectomy was performed in each @entity1 . Five of the 6 obtained a highly gratifying response, including relief of the @entity1353 and @entity848 , an increase in arterial @entity4095 , and a decrease in pulmonary arterial pressure. In each of the five in whom improvement occurred, the back-bleeding from the pulmonary artery at the time of embolectomy was quite good. In the sixth @entity1 , the back-bleeding was very poor, and despite embolectomy, the vessel thrombosed postoperatively with no improvement in the @entity1 's clinical course. Follow-up studies in these @entity1 range up to 8 years with demonstration of continued patency of the pulmonary arteries as well as continued improvement in clinical symptoms and in the arterial @entity4095 .

Surgical management of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity1353 :: ('MESH:D004417', 'Disease') :: ['dyspnea'] @entity999 :: ('MESH:D020766', 'Disease') :: ['showers of emboli'] @entity120 :: ('MESH:D006976', 'Disease') :: ['pulmonary hypertension'] @entity49 :: ('MESH:D019851', 'Disease') :: ['thrombotic process in the systemic venous system'] @entity1151 :: ('MESH:D011655', 'Disease') :: ['chronic pulmonary embolism', 'pulmonary embolism'] @entity1576 :: ('MESH:D012131', 'Disease') :: ['respiratory insufficiency'] @entity123 :: ('MESH:D024741', 'Disease') :: ['ventricular hypertrophy'] @entity4095 :: ('MESH:C093415', 'Chemical') :: ['PO2'] @entity848 :: ('MESH:D003490', 'Disease') :: ['cyanosis']
@entity1151 :: (MESH:D011655,Disease) :: ['chronic pulmonary embolism']
