Generalized Malperfusion Due to Systemic Embolization From a Large Thrombosed Pulmonary Vein Aneurysm

We report the case of a 61-year-old patient who presented with generalized malperfusion due to systemic embolization from a large, partially thrombosed aneurysm of the left upper pulmonary vein. When the patient arrived at our center, large thrombus formations were detected in the left atrium and the abdominal aorta, as well as the renal, iliac, and femoral arteries. Renal, splenic, and mesenteric ischemia was diagnosed with computed tomography. The patient was in shock, acute kidney failure, and in high vasopressor need. The case highlights the risk of intraluminal thrombus formation in pulmonary vein aneurysms and underlines the need for systemic anticoagulation therapy and surgical therapy, if diagnosed in time.