Thoracic Aorta (Multidetector Computed Tomography and Magnetic Resonance Evaluation)

Presentation, Diagnosis, and Outcomes of Acute Aortic Dissection

“…Greater availability and increased use of advanced imaging modalities, particularly computed tomography (CT), have the potential to improve the diagnosis of AAD (7,8). Improvement in surgical and anesthetic techniques have led to improved survival of patients with type A dissection, whereas the expanded use of endovascular interventions is having a growing effect on management of type B dissection (9,10).…”

Hemodynamic changes lead to alterations in aortic diameters and may challenge further stent graft sizing in acute aortic syndrome

“…The induced blood loss led to ~40% decrease in the AD measured by IVUS (16). However, hypovolemic conditions do not only decrease ADs via impaired intravascular filling; the neurohumoral response to hypotension also leads to vasoconstriction through the angiotensin II-mediated pathway and increases further loss of diameter (17). In our study, we only used basic clinical parameters, such as heart rate, blood pressure and hematocrit level, as markers for intravascular filling; additional influences of the aortic wall are not the subject of the current study and need further evaluation.…”

Update on state of the art magnetic resonance angiography techniques

“…In patients with intramural hematoma, MRI can be used to assess the acuity of the hematoma due to changes in the signal characteristics of hemoglobin degradation products. 34 In general, intramural hematoma is demonstrated by wall thickening and mural hyperintensity on T1-weighted black blood images. In the hyperacute phase, intramural hematoma may be isointense on T1-weighted images and hyperintense on T2-weighted images.…”