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Phase contrast MR imaging to measure changes in collateral blood flow after stenting of recurrent aortic coarctation: Initial experience
Author(s) -
Pujadas Sandra,
Reddy Gautham P.,
Weber Oliver,
Tan Christopher,
Moore Philip,
Higgins Charles B.
Publication year - 2006
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.20613
Subject(s) - medicine , collateral circulation , aorta , blood flow , descending aorta , stent , coarctation of the aorta , radiology , angiography , magnetic resonance imaging , cardiology
Purpose To assess the feasibility of using phase contrast magnetic resonance (PC‐MR) imaging to measure the change in collateral blood flow early after stenting of aortic coarctation. Materials and Methods A total of 10 consecutive patients with coarctation of the aorta underwent MR imaging, X‐ray angiography, and stent placement. PC‐MR at two sites in the descending aorta was performed before and early after stenting in order to estimate collateral inflow to the descending thoracic aorta. The collateral flow and collateral flow percentage before and after stent placement were compared. Results Before stenting, the mean proximal aortic flow = 43.9 ± 14.6 mL/second; mean distal flow = 54.2 ± 10 mL/second; collateral flow = 10.2 ± 6.8 mL/second; and collateral flow percentage = 30.1 ± 27.9%. After stenting, the mean proximal aortic flow = 62.1 ± 17.9 mL/second; mean distal flow = 60 ± 19 mL/second; collateral flow = –1.9 ± 3.7 mL/second; and collateral flow percentage = –3.3 ± 6.8%. Conclusion PC‐MR can be used to measure changes in collateral circulation after stent treatment of coarctation of the aorta. J. Magn. Reson. Imaging 2006. © 2006 Wiley‐Liss, Inc.