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Updated: Jul 18, 2026

Catheter-based Endovascular Angioplasty for Fibrosing Mediastinitis-associated Pulmonary Vein Stenosis
Published on: August 26, 2025
Superior vena cava thrombectomy with the X-SIZER catheter system in a child with Fontan palliation
Jeffrey G Gossett1, Albert P Rocchini, Aimee K Armstrong
1Division of Pediatric Cardiology, Department of Pediatrics and Communicable Diseases, University of Michigan Health System, Ann Arbor, Michigan 48109-0204, USA.
Abstract:
A 4-year-old female with hypoplastic left heart syndrome and Fontan palliation presented with severe neurologic impairment from thrombosis of the superior vena cava (SVC). She underwent successful SVC thrombectomy with the X-SIZER Thrombectomy Catheter System, followed by balloon angioplasty. She demonstrated rapid improvement in her neurologic deficits after the procedure. This represents the first published use of the X-SIZER in a child and its first published use for SVC thrombectomy.

