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Time‐resolved three‐dimensional contrast‐enhanced magnetic resonance angiography in patients who have undergone a Fontan operation or bidirectional cavopulmonary connection: Initial experience
Author(s) -
Goo Hyun Woo,
Yang Dong Hyun,
Park InSook,
Ko Jae Kon,
Kim Young Hwee,
Seo DongMan,
Yun TaeJin,
Park JeongJun
Publication year - 2007
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.20870
Subject(s) - medicine , perfusion , radiology , fontan procedure , angiography , pulmonary vein , occlusion , magnetic resonance imaging , pulmonary artery , magnetic resonance angiography , stenosis , left pulmonary artery , lung , steady state free precession imaging , cardiology , ventricle , atrial fibrillation
Purpose To evaluate the usefulness of time‐resolved three‐dimensional (3D) magnetic resonance angiography (MRA) using diluted contrast agent (CA) in patients who had undergone a Fontan operation or bidirectional cavopulmonary connection (BCPC). Materials and Methods Time‐resolved 3D MRA (10 dynamic data sets, two seconds per dynamic data set) using parallel imaging and keyhole data sampling was performed on 15 patients (median age = 10 years, range = 1–20 years) who had undergone a Fontan operation ( N = 11) or BCPC ( N = 4). Diluted gadolinium (Gd) contrast agent (CA) was intravenously injected into the arm and/or leg veins. The flow dynamics and morphology of pulmonary circulation, and lung perfusion were assessed. Results Preferential or balanced pulmonary blood flow from each systemic vein was visualized on time‐resolved 3D MRA in all patients. In addition, occlusion/stenosis of the central thoracic vein ( N = 4) and pulmonary artery ( N = 6), systemic venous ( N = 5) and arterial ( N = 6) collaterals, and lung perfusion defect ( N = 4) were identified. Persistent hepatic venous plexus, pulmonary arteriovenous malformation, and axillary arteriovenous fistula were delineated in three patients, respectively. Conclusion Time‐resolved 3D MRA with diluted CA is useful for evaluating patients who have undergone a Fontan operation or BCPC because it can reveal the flow dynamics and morphology of pulmonary circulation, and lung perfusion status. J. Magn. Reson. Imaging 2007. © 2007 Wiley‐Liss, Inc.