Spontaneous resolution of pulmonary venous thrombosis after lung transplantation.

Thrombus formation at the pulmonary venous anastomotic site after lung transplantation may have catastrophic consequences, including allograft failure and stroke. However, treatment with systemic anticoagulation may facilitate bleeding in the early postoperative period. In the present report, we describe the clinical and transesophageal echocardiographic findings of pulmonary venous thrombosis in two patients in the immediate postoperative period after lung transplantation. Treatment with systemic anticoagulation was not feasible because of extensive postoperative thoracic bleeding in each instance. A conservative approach was taken on the basis of the small size of each thrombus and lack of accelerated flow velocity at the site of the thrombus. Each thrombus resolved spontaneously without clinical sequelae. These two cases suggest that thrombus size and flow velocity at the anastomotic site may be used to guide the clinical management of pulmonary venous thrombosis after lung transplantation.