Abstract No. 422: Respiratory deformation of the superior mesenteric artery and renal arteries in patients with abdominal aortic aneurysms

Abstract

PurposeQuantify the deformation of the superior mesenteric artery (SMA) and renal arteries (RAs) due to respiration in abdominal aortic aneurysm (AAA) patients.Materials and Methods10 AAA patients (75±7 years) were scanned with contrast-enhanced magnetic resonance angiography during inspiratory and expiratory breath-holds. From 3D geometric models of the abdominal aorta and its branches, we computed curvature, branching angle, and translation of bifurcation points for the SMA and RAs. The bifurcation point for the SMA was the jenunal branch, and for the RAs it was the proximal branch.ResultsWith expiration, the SMA and both RAs angled upwards significantly (P<0.05). Both RA bifurcation points translated superiorly and posteriorly (P<0.05), while the SMA translated superiorly and rightward (P<0.05). Maximum curvature changes were greater in the left than the right RA (P<0.05). Superior and posterior movement of the bifurcation point was greater in the RAs than the SMA (P<0.05), while the SMA moved more to the right than the RAs (P<0.05).ConclusionTabled 1Changes in Curvature, Branching Angle, and Position of Bifurcation from Inspiration to Expiration in the Superior Mesenteric artery (SMA) and Renal Arteries (RAs)ArteryMaximum curvature changes (/mm)Branching angle changes (°)Inferior-to-superior bifurcation movement (mm)Anterior-to-posterior bifurcation movement (mm)Left-to-right bifurcation movement (mm)SMA0.049±0.0218.51±4.73⁎indicates significant changes due to respiration (P<0.05).8.76±6.57⁎indicates significant changes due to respiration (P<0.05).†and‡indicate significant differences between arteries (P<0.05).1.03±2.71†and‡indicate significant differences between arteries (P<0.05).3.36±3.51⁎indicates significant changes due to respiration (P<0.05).†and‡indicate significant differences between arteries (P<0.05).Left RA0.072±0.037†and5.78±7.45⁎indicates significant changes due to respiration (P<0.05).15.59±8.52⁎indicates significant changes due to respiration (P<0.05).†and5.66±4.15⁎indicates significant changes due to respiration (P<0.05).†and0.60±4.28†andRight RA0.030±0.016†and6.92±5.77⁎indicates significant changes due to respiration (P<0.05).14.06±4.69⁎indicates significant changes due to respiration (P<0.05).‡indicate significant differences between arteries (P<0.05).5.85±2.85⁎indicates significant changes due to respiration (P<0.05).‡indicate significant differences between arteries (P<0.05).-0.56±4.11‡indicate significant differences between arteries (P<0.05). indicates significant changes due to respiration (P<0.05).† and‡ indicate significant differences between arteries (P<0.05). Open table in a new tab PurposeQuantify the deformation of the superior mesenteric artery (SMA) and renal arteries (RAs) due to respiration in abdominal aortic aneurysm (AAA) patients. Quantify the deformation of the superior mesenteric artery (SMA) and renal arteries (RAs) due to respiration in abdominal aortic aneurysm (AAA) patients. Materials and Methods10 AAA patients (75±7 years) were scanned with contrast-enhanced magnetic resonance angiography during inspiratory and expiratory breath-holds. From 3D geometric models of the abdominal aorta and its branches, we computed curvature, branching angle, and translation of bifurcation points for the SMA and RAs. The bifurcation point for the SMA was the jenunal branch, and for the RAs it was the proximal branch. 10 AAA patients (75±7 years) were scanned with contrast-enhanced magnetic resonance angiography during inspiratory and expiratory breath-holds. From 3D geometric models of the abdominal aorta and its branches, we computed curvature, branching angle, and translation of bifurcation points for the SMA and RAs. The bifurcation point for the SMA was the jenunal branch, and for the RAs it was the proximal branch. ResultsWith expiration, the SMA and both RAs angled upwards significantly (P<0.05). Both RA bifurcation points translated superiorly and posteriorly (P<0.05), while the SMA translated superiorly and rightward (P<0.05). Maximum curvature changes were greater in the left than the right RA (P<0.05). Superior and posterior movement of the bifurcation point was greater in the RAs than the SMA (P<0.05), while the SMA moved more to the right than the RAs (P<0.05). With expiration, the SMA and both RAs angled upwards significantly (P<0.05). Both RA bifurcation points translated superiorly and posteriorly (P<0.05), while the SMA translated superiorly and rightward (P<0.05). Maximum curvature changes were greater in the left than the right RA (P<0.05). Superior and posterior movement of the bifurcation point was greater in the RAs than the SMA (P<0.05), while the SMA moved more to the right than the RAs (P<0.05). ConclusionTabled 1Changes in Curvature, Branching Angle, and Position of Bifurcation from Inspiration to Expiration in the Superior Mesenteric artery (SMA) and Renal Arteries (RAs)ArteryMaximum curvature changes (/mm)Branching angle changes (°)Inferior-to-superior bifurcation movement (mm)Anterior-to-posterior bifurcation movement (mm)Left-to-right bifurcation movement (mm)SMA0.049±0.0218.51±4.73⁎indicates significant changes due to respiration (P<0.05).8.76±6.57⁎indicates significant changes due to respiration (P<0.05).†and‡indicate significant differences between arteries (P<0.05).1.03±2.71†and‡indicate significant differences between arteries (P<0.05).3.36±3.51⁎indicates significant changes due to respiration (P<0.05).†and‡indicate significant differences between arteries (P<0.05).Left RA0.072±0.037†and5.78±7.45⁎indicates significant changes due to respiration (P<0.05).15.59±8.52⁎indicates significant changes due to respiration (P<0.05).†and5.66±4.15⁎indicates significant changes due to respiration (P<0.05).†and0.60±4.28†andRight RA0.030±0.016†and6.92±5.77⁎indicates significant changes due to respiration (P<0.05).14.06±4.69⁎indicates significant changes due to respiration (P<0.05).‡indicate significant differences between arteries (P<0.05).5.85±2.85⁎indicates significant changes due to respiration (P<0.05).‡indicate significant differences between arteries (P<0.05).-0.56±4.11‡indicate significant differences between arteries (P<0.05). indicates significant changes due to respiration (P<0.05).† and‡ indicate significant differences between arteries (P<0.05). 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