Normal values for aortic diameters in children and adolescents – assessment <it>in vivo </it>by contrast-enhanced CMR-angiography

• Main Authors: Bergsträsser Eva, Albisetti Manuela, Kellenberger Christian J, Kaiser Thomas, Valsangiacomo Buechel Emanuela R
• Format: Article
• Language: English
• Published: BMC 2008-12-01
• Series: Journal of Cardiovascular Magnetic Resonance
• Online Access: http://www.jcmr-online.com/content/10/1/56

<p>Abstract</p> <p>Background</p> <p>Contrast-enhanced CMR angiography (CE-CMRA) is being increasingly used for diagnosing aortic arch anomalies, planning interventions and follow-up assessment. We sought to establish normal values for the diameters of the thoracic aorta and reference curves related to body growth in children using CE-CMRA.</p> <p>Results</p> <p>CE-CMRA was performed in 53 children without cardiovascular disease. The median age was 9 years (range 2 – 20 years), weight 30 kg (range 12 – 75 kg), height 131 cm (range 81 – 184 cm), body surface area (BSA) 1.05 m²(range 0.52–1.9 m²). Aortic diameters were measured at nine standardized sites on oblique maximum-intensity projection (MIP) images. Regression analysis of diameters in relation to BSA demonstrated linear relationship between the cross-sectional aortic diameters and the square root of BSA (BSA^0.5). Normative diameters were (0.57 + 19.37*BSA^0.5) mm for the aortic sinus, (-3.52 + 18.66*BSA^0.5) mm for the first segment of the aortic arch, (-3.37 + 16.52*BSA^0.5) mm for the isthmic region and (-1.27 + 9.89*BSA^0.5) mm for the descending aorta at the level of the diaphragm. Normative curves are presented.</p> <p>Conclusion</p> <p>This study provides normative values for aortic diameters in children measured by CE-CMRA. These data may serve for making the diagnosis of pediatric arch anomalies, assessing the need for treatment and planning interventions.</p>