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Thrombus straddling an atrial septal defect: surgical prevention of massive pulmonary and systemic embolization.

A large thrombus entrapped in an atrial septal defect is a rare condition that can lead to life-threatening systemic and pulmonary embolization. The use of thrombolysis may prove dangerous to the patient. Herein, we describe the emergency surgical management that contributed to a successful outcome in a 67-year-old man who was found to have a 23-cm-long thrombus across an atrial septal defect.