Aortic aneurysms: growth rates measured with CT.

Hirose, Yoshiaki; Hamada, Seiki; Takamiya, Makoto; Imakita, Satoshi; Naito, Hiroshi; Nishimura, Toshihiro

doi:10.1148/radiology.185.1.1523317

Cited by 101 publications

(68 citation statements)

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“…However, there were only a few reports on the growth rate of thoracic aortic aneurysm (TAA) that demonstrated that the growth rate had a range of 1.3 to 4.3 mm/year. 4,5,7 In the present study, the growth rate of AD in the thoracic aorta was 4.1 mm/year, and the ADs in the thoracic aorta grew at a faster rate than those in the abdominal aorta. These results were similar to some results in previous studies.…”

Section: Discussionsupporting

confidence: 46%

“…4,5,16,17 According to these results, the growth rate of AAA had a range of 2.2 to 5.7 mm/year. 4,5,16,17 Although AD and aortic aneurysm ultimately have different natural histories, the growth rate of the abdominal aorta in our results was 1.2 mm/year, which was slower than previous reports. For this reason, the aortic diameter of AD may usually be smaller than that of AAA.…”

Section: Discussionmentioning

confidence: 96%

“…6,7,12,14,15 These results can be explained by the La Place Law. 4,6 It states that the perpendicular stress on a cylinder is directly proportional to the pressure exerted by the fluid contents and its radius and is inversely proportional to wall thickness. This means that the larger the diameter, the faster the growth rate if the pressure is constant.…”

Section: Discussionmentioning

confidence: 99%

“…The largest short-axial diameter of the outer contour of the affected segment of aorta was measured (Figure a). 4 In the aortic arch, the largest diameter perpendicular to the curvature was measured (Figure b). 4 The diameters were measured with direct-reading calibers from hardcopy images and corrected for the appropriate scale.…”

Section: Image Analysismentioning

confidence: 99%

“…In comparison with ultrasound, CT can provide superior images in obese patients and is not hindered by the lungs or intestinal gas. 4 Ultrasound is not useful in imaging of the thoracic aorta. As a major disadvantage of CT, contrast media cannot be used for patients with severe renal dysfunction.…”

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confidence: 99%

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Growth Rate of Aortic Diameter in Patients With Type B Aortic Dissection During the Chronic Phase

Sueyoshi

Sakamoto²,

Hayashi³

et al. 2004

Circulation

166

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Background-The purpose of this study was to evaluate the growth rate of type B double-barrel aortic dissection with computed tomography (CT) and the factors influencing its enlargement. Methods and Results-Sixty-two patients were entered into this study, and regular follow-up CT studies (mean; 49.1 months) were performed. The affected aortas and iliac arteries were divided into 5 segments (aortic arch, descending thoracic, suprarenal abdominal, infrarenal abdominal aorta, and iliac artery). Fifty-two of 62 patients (83.9%) had 1 or more segments increased in size during follow-up period. In a total of 177 segments, the presence or absence of blood flow in the false lumen and aortic diameter were evaluated on CT during the follow-up period. The factors (gender, diabetes mellitus, atherosclerotic disease, smoking, entry site in arch, initial diameter, chronic obstructive pulmonary disease, blood pressure, and age) influencing increase in the diameter and growth rate were also evaluated. Of 177 segments, 132 segments (74.6%) increased in size during the follow-up period. The presence of blood flow in the false lumen was the only significant risk factor for increase in the diameter in the univariate and multivariate analysis. The group with blood flow in the false lumen had a significantly higher mean growth rate (3.3 mm/year) than the group without blood flow (Ϫ1.4 mm/year) (PϽ0.0001). The growth rate of aortic dissections in thoracic aorta and abdominal aorta were 4.1 and 1.2 mm/year, respectively. There was a significant difference in the growth rate between the 2 groups (Pϭ0.0003). Conclusion-In type B aortic dissection, the affected aortas have shown a high incidence of enlargement during the follow-up period, and more careful follow-up study is needed for aortic dissections in the thoracic aorta. The presence of blood flow in the false lumen is the most important risk factor for aortic enlargement.

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Section: Discussionsupporting

confidence: 46%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Image Analysismentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Growth Rate of Aortic Diameter in Patients With Type B Aortic Dissection During the Chronic Phase

Sueyoshi

Sakamoto²,

Hayashi³

et al. 2004

Circulation

166

View full text Add to dashboard Cite

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Aortic Aneurysm and Pseudoaneurysm Assessment

Contreras

Amin

Yucel

2001

CP Magnetic Resonance Imaging

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Although contrast angiography is still considered the “gold standard” for evaluation of the aorta and its major branches, Magnetic Resonance Angiography (MRA) has quickly gained popularity as an imaging tool for the assessment of the entire aorta. MRA serves as an alternative imaging modality that can be utilized in patients with impaired renal function and with allergies to iodinated contrast medium (iodinated contrast medium is required in contrast angiography and computed tomography, CT). The purpose of this unit is to present fundamental MRA techniques useful in the evaluation of the thoracic and abdominal aorta based on experience on a 1.5 T GE LX scanner.

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Orthogonal measurement of thoracic aorta luminal diameter using ECG‐gated high‐resolution contrast‐enhanced MR angiography

Bireley

Diniz

Groves

et al. 2007

Magnetic Resonance Imaging

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Purpose:To compare orthogonal measurements of the thoracic aortic luminal diameter to standard axial measurements within the same patient population using ECGgated high-resolution contrast-enhanced MR angiography (CE-MRA). Materials and Methods:In all, 45 consecutive patients who had undergone CE-MRA for suspected disease of the thoracic aorta were evaluated retrospectively. Two diameter measurement techniques were performed for each patient's thoracic aorta: standard axial and orthogonal to the aorta. Seven anatomic locations along the thoracic aorta were used for measurement. The data obtained were compared using a paired, two-tailed t-test. Results:We found that the aorta diameter measurements acquired from axial MRA images were significantly greater (P Ͻ 0.05) than those acquired from images orthogonal to the course of the aorta at six of seven anatomic sites. Overall, standard axial measurements were found to overestimate luminal diameter of the thoracic aorta by 0.24 cm (95% confidence interval [CI]: 0.14, 0.33) compared to orthogonal measurements. 13.3% of the patients were placed into a greater aorta size classification based on the axial versus the orthogonal measurements. Conclusion:Standard axial measurements can overestimate vessel size of the thoracic aorta. ECG-gated highresolution CE-MRA can be used to measure orthogonal diameters of the thoracic aorta.

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Aortic aneurysms: growth rates measured with CT.

Cited by 101 publications

References 0 publications

Growth Rate of Aortic Diameter in Patients With Type B Aortic Dissection During the Chronic Phase

Growth Rate of Aortic Diameter in Patients With Type B Aortic Dissection During the Chronic Phase

Aortic Aneurysm and Pseudoaneurysm Assessment

Orthogonal measurement of thoracic aorta luminal diameter using ECG‐gated high‐resolution contrast‐enhanced MR angiography

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