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A 77-year-old Caucasian woman with recent abdominal surgery was diagnosed with multiple paradoxical systemic emboli in the mesenteric and renal circulation. Diagnosis was made by direct visualisation of a serpentine thrombus traversing both atria through patent foramen ovale (PFO) by transesophageal echocardiogram (TEE). Concomitantly, the patient was found to have deep venous thrombosis and pulmonary embolism. A decision was made to pursue cardiothoracic surgery preceded by inferior vena cava filter placement. She was started on intravenous anticoagulation. Repeat TEE was negative for thrombus and the patient did not present any new clinical signs of embolisation by this time. Consequently, the treatment plan was modified and the patient received oral systemic anticoagulation followed by PFO closure with the use of St. Jude Amplatzer Cribriform septal occluder device. During the outpatient follow-up the patient was asymptomatic and there was no significant flow through the device on transthoracic echocardiogram.

Serpentine thrombus in the heart: a rare case of trapped thrombus in patent foramen ovale