Quantification of collateral blood flow in coarctation of the aorta by velocity encoded cine magnetic resonance imaging.

• DOI: 10.1161/01.cir.90.2.937
• Publication Date: 2012-06-12T00:34:42Z
• Authors: J C Steffens; M W Bourne; H Sakuma; M O'Sullivan; C B Higgins
• Keywords: Descending aorta; Thoracic aorta; Collateral circulation

Knowledge about the volume of collateral flow provides insight into severity coarctation aorta and may be critical in planning operative approach. There is currently no method for quantification aorta. In this study, we applied velocity encoded cine magnetic resonance imaging (VENC-MR) to establish pattern descending thoracic normal subjects patients with coarctation, introducing a new possibility quantify by determining amount flow.VENC-MR was used measure proximal distal 10 subjects. 23 measured near site above diaphragm. Patients were divided group moderate severe mild on basis clinical gradient between upper lower extremities estimation across Doppler echocardiography. The degree anatomic narrowing also assessed MR imaging. volunteers, VENC-MR showed 7 +/- 6% decrease total flow, from interobserver reproducibility 3.9% 4.9% (mean, 4.4%). demonstrated an 83 50% increase aorta, yielding significant change compared (P < .01). flow. relation reduction luminal diameter at (r = .94) as well .84).This study shows its reversal due Thus, can serves unique providing important measurement